Add more bots to cronet's pool on chromium.android.

scripts/slave/recipes/cronet.expected/android_cronet_marshmallow_64bit_builder.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "\nimport os, sys\n\nbuild_path = sys.argv[1]\nif os.path.exists(build_path):\n  for (path, dir, files) in os.walk(build_path):\n    for cur_file in files:\n      if cur_file.endswith('index.lock'):\n        path_to_file = os.path.join(path, cur_file)\n        print 'deleting %s' % path_to_file\n        os.remove(path_to_file)\n",
       "[SLAVE_BUILD]"
     ],
     "name": "cleanup index.lock",
     "~followup_annotations": [
@@ skipping 12 matching lines @@
     ]
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--master",
       "chromium.testing.master",
       "--builder",
-      "Android Cronet Builder",
+      "Android Cronet Marshmallow 64bit Builder",
       "--slave",
       "TestSlavename",
       "--spec",
       "cache_dir = '[GIT_CACHE]'\nsolutions = [{'deps_file': '.DEPS.git', 'managed': True, 'name': 'src', 'url': 'https://chromium.googlesource.com/chromium/src'}]\ntarget_os = ['android']",
       "--root",
       "src",
       "--revision_mapping_file",
       "{\"src\": \"got_src_revision\", \"src/buildtools\": \"got_buildtools_revision\", \"src/native_client\": \"got_nacl_revision\", \"src/third_party/angle\": \"got_angle_revision\", \"src/third_party/webrtc\": \"got_webrtc_revision\", \"src/tools/swarming_client\": \"got_swarming_client_revision\", \"src/v8\": \"got_v8_revision\"}",
       "--git-cache-dir",
       "[GIT_CACHE]",
@@ skipping 188 matching lines @@
       "python",
       "-u",
       "RECIPE_PACKAGE_REPO[depot_tools]/gclient.py",
       "runhooks"
     ],
     "cwd": "[SLAVE_BUILD]/src",
     "env": {
       "GOMA_SERVICE_ACCOUNT_JSON_FILE": "/creds/service_accounts/service-account-goma-client.json",
       "GYP_CHROMIUM_NO_ACTION": "1",
       "GYP_CROSSCOMPILE": "1",
-      "GYP_DEFINES": "OS=android component=static_library disable_brotli_filter=1 disable_file_support=1 disable_ftp_support=1 enable_websockets=0 fastbuild=1 gomadir='[CACHE]/cipd/goma' target_arch=arm use_goma=1 use_platform_icu_alternatives=1",
+      "GYP_DEFINES": "OS=android component=static_library disable_brotli_filter=1 disable_file_support=1 disable_ftp_support=1 enable_websockets=0 fastbuild=1 gomadir='[CACHE]/cipd/goma' target_arch=arm64 use_goma=1 use_platform_icu_alternatives=1",
       "PATH": "[SLAVE_BUILD]/src/third_party/android_tools/sdk/platform-tools:[SLAVE_BUILD]/src/build/android:%(PATH)s:RECIPE_PACKAGE_REPO[depot_tools]"
     },
     "name": "gclient runhooks"
   },
   {
     "cmd": [
       "python",
       "-u",
       "[SLAVE_BUILD]/src/tools/mb/mb.py",
       "gen",
       "-m",
       "chromium.testing.master",
       "-b",
-      "Android Cronet Builder",
+      "Android Cronet Marshmallow 64bit Builder",
       "--config-file",
       "[SLAVE_BUILD]/src/tools/mb/mb_config.pyl",
       "--goma-dir",
       "[CACHE]/cipd/goma",
       "//out/Release"
     ],
     "cwd": "[SLAVE_BUILD]/src",
     "env": {
       "GOMA_SERVICE_ACCOUNT_JSON_FILE": "/creds/service_accounts/service-account-goma-client.json"
     },
@@ skipping 48 matching lines @@
   {
     "allow_subannotations": true,
     "cmd": [
       "python",
       "-u",
       "RECIPE_PACKAGE_REPO[build]/scripts/slave/runtest.py",
       "--target",
       "Release",
       "--no-xvfb",
       "--factory-properties",
-      "{\"blamelist\": [\"cool_dev1337@chromium.org\", \"hax@chromium.org\"], \"branch\": \"master\", \"buildername\": \"Android Cronet Builder\", \"buildnumber\": 571, \"mastername\": \"chromium.testing.master\", \"project\": \"src\", \"recipe\": \"cronet\", \"repository\": \"https://chromium.googlesource.com/chromium/src\", \"revision\": \"4f4b02f6b7fa20a3a25682c457bbc8ad589c8a00\", \"slavename\": \"TestSlavename\", \"workdir\": \"/path/to/workdir/TestSlavename\"}",
+      "{\"blamelist\": [\"cool_dev1337@chromium.org\", \"hax@chromium.org\"], \"branch\": \"master\", \"buildername\": \"Android Cronet Marshmallow 64bit Builder\", \"buildnumber\": 571, \"mastername\": \"chromium.testing.master\", \"project\": \"src\", \"recipe\": \"cronet\", \"repository\": \"https://chromium.googlesource.com/chromium/src\", \"revision\": \"4f4b02f6b7fa20a3a25682c457bbc8ad589c8a00\", \"slavename\": \"TestSlavename\", \"workdir\": \"/path/to/workdir/TestSlavename\"}",
       "--build-properties",
-      "{\"blamelist\": [\"cool_dev1337@chromium.org\", \"hax@chromium.org\"], \"branch\": \"master\", \"buildername\": \"Android Cronet Builder\", \"buildnumber\": 571, \"mastername\": \"chromium.testing.master\", \"project\": \"src\", \"recipe\": \"cronet\", \"repository\": \"https://chromium.googlesource.com/chromium/src\", \"revision\": \"4f4b02f6b7fa20a3a25682c457bbc8ad589c8a00\", \"slavename\": \"TestSlavename\", \"workdir\": \"/path/to/workdir/TestSlavename\"}",
+      "{\"blamelist\": [\"cool_dev1337@chromium.org\", \"hax@chromium.org\"], \"branch\": \"master\", \"buildername\": \"Android Cronet Marshmallow 64bit Builder\", \"buildnumber\": 571, \"mastername\": \"chromium.testing.master\", \"project\": \"src\", \"recipe\": \"cronet\", \"repository\": \"https://chromium.googlesource.com/chromium/src\", \"revision\": \"4f4b02f6b7fa20a3a25682c457bbc8ad589c8a00\", \"slavename\": \"TestSlavename\", \"workdir\": \"/path/to/workdir/TestSlavename\"}",
       "--test-type=sizes",
-      "--builder-name=Android Cronet Builder",
+      "--builder-name=Android Cronet Marshmallow 64bit Builder",
       "--slave-name=TestSlavename",
       "--build-number=571",
       "--run-python-script",
       "--annotate=graphing",
       "--results-url=https://chromeperf.appspot.com",
       "--perf-dashboard-id=sizes",
       "--perf-id=android_cronet_builder",
       "RECIPE_PACKAGE_REPO[build]/scripts/slave/chromium/sizes.py",
       "--target",
       "Release",
@@ skipping 311 matching lines @@
       "RECIPE_MODULE[build::gsutil]/resources/gsutil_wrapper.py",
       "--",
       "RECIPE_PACKAGE_REPO[depot_tools]/gsutil.py",
       "--force-version",
       "4.7",
       "-o",
       "GSUtil:parallel_composite_upload_threshold=50M",
       "----",
       "cp",
       "[SLAVE_BUILD]/src/out/Release/full_log",
-      "gs://chromium-android/logcat_dumps/Android Cronet Builder/571"
+      "gs://chromium-android/logcat_dumps/Android Cronet Marshmallow 64bit Builder/571"
     ],
     "name": "gsutil upload",
     "~followup_annotations": [
-      "@@@STEP_LINK@logcat dump@https://storage.cloud.google.com/chromium-android/logcat_dumps/Android Cronet Builder/571@@@"
+      "@@@STEP_LINK@logcat dump@https://storage.cloud.google.com/chromium-android/logcat_dumps/Android Cronet Marshmallow 64bit Builder/571@@@"
     ]
   },
   {
     "cmd": [
       "[SLAVE_BUILD]/src/third_party/android_platform/development/scripts/stack",
       "--arch",
-      "arm",
+      "arm64",
       "--more-info",
       "[SLAVE_BUILD]/src/out/Release/full_log"
     ],
     "env": {
       "CHROMIUM_OUTPUT_DIR": "[SLAVE_BUILD]/src/out/Release",
       "GOMA_SERVICE_ACCOUNT_JSON_FILE": "/creds/service_accounts/service-account-goma-client.json",
       "PATH": "[SLAVE_BUILD]/src/third_party/android_tools/sdk/platform-tools:[SLAVE_BUILD]/src/build/android:%(PATH)s"
     },
     "name": "stack_tool_with_logcat_dump"
   },
@@ skipping 39 matching lines @@
       "@@@STEP_LOG_LINE@python.inline@  os.remove(report)@@@",
       "@@@STEP_LOG_END@python.inline@@@"
     ]
   },
   {
     "name": "$result",
     "recipe_result": null,
     "status_code": 0
   }
 ]