build: roll infra_paths changes

scripts/slave/recipes/nacl.expected/linux_triggering.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--master",
       "client.nacl",
       "--builder",
       "precise_64-newlib-arm_qemu-pnacl-dbg",
       "--slave",
       "TestSlave",
       "--spec",
-      "cache_dir = '[GIT_CACHE]'\nsolutions = [{'deps_file': 'DEPS', 'managed': True, 'name': 'native_client', 'url': 'https://chromium.googlesource.com/native_client/src/native_client.git'}]",
+      "cache_dir = '[ROOT]/b/build/slave/cache_dir'\nsolutions = [{'deps_file': 'DEPS', 'managed': True, 'name': 'native_client', 'url': 'https://chromium.googlesource.com/native_client/src/native_client.git'}]",
       "--root",
       "native_client",
       "--revision_mapping_file",
       "{\"native_client\": \"got_revision\"}",
       "--git-cache-dir",
-      "[GIT_CACHE]",
+      "[ROOT]/b/build/slave/cache_dir",
       "--output_json",
       "/path/to/tmp/json",
       "--revision",
       "native_client@abcd",
       "--force",
       "--output_manifest"
     ],
-    "cwd": "[SLAVE_BUILD]",
     "env": {
       "PATH": "%(PATH)s:RECIPE_PACKAGE_REPO[depot_tools]"
     },
     "name": "bot_update",
     "~followup_annotations": [
       "@@@STEP_TEXT@Some step text@@@",
       "@@@STEP_LOG_LINE@json.output@{@@@",
       "@@@STEP_LOG_LINE@json.output@  \"did_run\": true, @@@",
       "@@@STEP_LOG_LINE@json.output@  \"fixed_revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"native_client\": \"abcd\"@@@",
@@ skipping 18 matching lines @@
       "@@@SET_BUILD_PROPERTY@got_revision_cp@\"refs/heads/master@{#256160}\"@@@"
     ]
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_PACKAGE_REPO[depot_tools]/gclient.py",
       "runhooks"
     ],
-    "cwd": "[SLAVE_BUILD]",
     "env": {
       "PATH": "%(PATH)s:RECIPE_PACKAGE_REPO[depot_tools]"
     },
     "name": "gclient runhooks"
   },
   {
     "allow_subannotations": true,
     "cmd": [
       "python",
       "-u",
-      "[SLAVE_BUILD]/native_client/buildbot/buildbot_selector.py"
+      "[CWD]/native_client/buildbot/buildbot_selector.py"
     ],
-    "cwd": "[SLAVE_BUILD]/native_client",
+    "cwd": "[CWD]/native_client",
     "env": {
       "BUILDBOT_BUILDERNAME": "precise_64-newlib-arm_qemu-pnacl-dbg",
       "BUILDBOT_GOT_REVISION": "a95eb4c044a154d692a53fdfa564ee8de7aeea5b",
       "BUILDBOT_MASTERNAME": "client.nacl",
       "BUILDBOT_REVISION": "abcd",
       "BUILDBOT_SLAVE_TYPE": "BuilderTester",
-      "RUNTEST": "[BUILD]/scripts/slave/runtest.py"
+      "RUNTEST": "[ROOT]/b/build/scripts/slave/runtest.py"
     },
     "name": "annotated steps"
   },
   {
     "cmd": [],
-    "cwd": "[SLAVE_BUILD]",
     "name": "trigger",
     "trigger_specs": [
       {
         "builder_name": "oneiric_32-newlib-arm_hw-pnacl-panda-dbg",
         "properties": {
           "parent_slavename": "TestSlave"
         }
       }
     ],
     "~followup_annotations": [
       "@@@STEP_TEXT@oneiric_32-newlib-arm_hw-pnacl-panda-dbg@@@"
     ]
   },
   {
     "name": "$result",
     "recipe_result": null,
     "status_code": 0
   }
 ]