Roll recipe dependencies (nontrivial).

scripts/slave/recipes/art.expected/host-x86_64-debug__ON__client.art__noclobber.json

 [
   {
     "cmd": [
       "[DEPOT_TOOLS]/repo",
       "init",
       "-u",
       "https://android.googlesource.com/platform/manifest",
       "-b",
       "master-art"
     ],
-    "cwd": "[SLAVE_BUILD]",
     "name": "repo init"
   },
   {
     "cmd": [
       "[DEPOT_TOOLS]/repo",
       "sync"
     ],
-    "cwd": "[SLAVE_BUILD]",
     "name": "repo sync"
   },
   {
     "cmd": [
       "[SLAVE_BUILD]/art/tools/buildbot-build.sh",
       "-j8",
       "--host"
     ],
-    "cwd": "[SLAVE_BUILD]",
     "env": {
       "ANDROID_BUILD_TOP": "[SLAVE_BUILD]",
       "ART_TEST_FULL": "false",
       "ART_TEST_INTERPRETER": "true",
       "ART_TEST_JIT": "true",
       "ART_TEST_KEEP_GOING": "true",
       "ART_TEST_OPTIMIZING": "true",
       "ART_TEST_RUN_TEST_2ND_ARCH": "false",
       "ART_USE_OPTIMIZING_COMPILER": "true",
       "JACK_REPOSITORY": "[SLAVE_BUILD]/prebuilts/sdk/tools/jacks",
       "JACK_SERVER": "false",
       "LEGACY_USE_JAVA7": "true",
       "PATH": "[SLAVE_BUILD]/out/host/linux-x86/bin:%(PATH)s",
       "TARGET_BUILD_TYPE": "release",
       "TARGET_BUILD_VARIANT": "eng",
       "TARGET_PRODUCT": "sdk"
     },
     "name": "build sdk-eng"
   },
   {
     "cmd": [
       "make",
       "-j8",
       "test-art-host-gtest64"
     ],
-    "cwd": "[SLAVE_BUILD]",
     "env": {
       "ANDROID_BUILD_TOP": "[SLAVE_BUILD]",
       "ART_TEST_FULL": "false",
       "ART_TEST_INTERPRETER": "true",
       "ART_TEST_JIT": "true",
       "ART_TEST_KEEP_GOING": "true",
       "ART_TEST_OPTIMIZING": "true",
       "ART_TEST_RUN_TEST_2ND_ARCH": "false",
       "ART_USE_OPTIMIZING_COMPILER": "true",
       "JACK_REPOSITORY": "[SLAVE_BUILD]/prebuilts/sdk/tools/jacks",
       "JACK_SERVER": "false",
       "LEGACY_USE_JAVA7": "true",
       "PATH": "[SLAVE_BUILD]/out/host/linux-x86/bin:%(PATH)s",
       "TARGET_BUILD_TYPE": "release",
       "TARGET_BUILD_VARIANT": "eng",
       "TARGET_PRODUCT": "sdk"
     },
     "name": "test gtest"
   },
   {
     "cmd": [
       "make",
       "-j8",
       "test-art-host-run-test-optimizing",
       "dist"
     ],
-    "cwd": "[SLAVE_BUILD]",
     "env": {
       "ANDROID_BUILD_TOP": "[SLAVE_BUILD]",
       "ART_TEST_FULL": "false",
       "ART_TEST_INTERPRETER": "true",
       "ART_TEST_JIT": "true",
       "ART_TEST_KEEP_GOING": "true",
       "ART_TEST_OPTIMIZING": "true",
       "ART_TEST_RUN_TEST_2ND_ARCH": "false",
       "ART_TEST_RUN_TEST_DEBUGGABLE": "true",
       "ART_USE_OPTIMIZING_COMPILER": "true",
       "JACK_REPOSITORY": "[SLAVE_BUILD]/prebuilts/sdk/tools/jacks",
       "JACK_SERVER": "false",
       "LEGACY_USE_JAVA7": "true",
       "PATH": "[SLAVE_BUILD]/out/host/linux-x86/bin:%(PATH)s",
       "TARGET_BUILD_TYPE": "release",
       "TARGET_BUILD_VARIANT": "eng",
       "TARGET_PRODUCT": "sdk"
     },
     "name": "test optimizing"
   },
   {
     "cmd": [
       "make",
       "-j5",
       "test-art-host-run-test-interpreter",
       "dist"
     ],
-    "cwd": "[SLAVE_BUILD]",
     "env": {
       "ANDROID_BUILD_TOP": "[SLAVE_BUILD]",
       "ART_TEST_FULL": "false",
       "ART_TEST_INTERPRETER": "true",
       "ART_TEST_JIT": "true",
       "ART_TEST_KEEP_GOING": "true",
       "ART_TEST_OPTIMIZING": "true",
       "ART_TEST_RUN_TEST_2ND_ARCH": "false",
       "ART_USE_OPTIMIZING_COMPILER": "true",
       "JACK_REPOSITORY": "[SLAVE_BUILD]/prebuilts/sdk/tools/jacks",
       "JACK_SERVER": "false",
       "LEGACY_USE_JAVA7": "true",
       "PATH": "[SLAVE_BUILD]/out/host/linux-x86/bin:%(PATH)s",
       "TARGET_BUILD_TYPE": "release",
       "TARGET_BUILD_VARIANT": "eng",
       "TARGET_PRODUCT": "sdk"
     },
     "name": "test interpreter"
   },
   {
     "cmd": [
       "make",
       "-j8",
       "test-art-host-run-test-jit",
       "dist"
     ],
-    "cwd": "[SLAVE_BUILD]",
     "env": {
       "ANDROID_BUILD_TOP": "[SLAVE_BUILD]",
       "ART_TEST_FULL": "false",
       "ART_TEST_INTERPRETER": "true",
       "ART_TEST_JIT": "true",
       "ART_TEST_KEEP_GOING": "true",
       "ART_TEST_OPTIMIZING": "true",
       "ART_TEST_RUN_TEST_2ND_ARCH": "false",
       "ART_USE_OPTIMIZING_COMPILER": "true",
       "JACK_REPOSITORY": "[SLAVE_BUILD]/prebuilts/sdk/tools/jacks",
       "JACK_SERVER": "false",
       "LEGACY_USE_JAVA7": "true",
       "PATH": "[SLAVE_BUILD]/out/host/linux-x86/bin:%(PATH)s",
       "TARGET_BUILD_TYPE": "release",
       "TARGET_BUILD_VARIANT": "eng",
       "TARGET_PRODUCT": "sdk"
     },
     "name": "test jit"
   },
   {
     "cmd": [
       "[SLAVE_BUILD]/art/tools/run-libcore-tests.sh",
       "--mode=host",
       "--variant=X64",
       "--debug"
     ],
-    "cwd": "[SLAVE_BUILD]",
     "env": {
       "ANDROID_BUILD_TOP": "[SLAVE_BUILD]",
       "ART_TEST_FULL": "false",
       "ART_TEST_INTERPRETER": "true",
       "ART_TEST_JIT": "true",
       "ART_TEST_KEEP_GOING": "true",
       "ART_TEST_OPTIMIZING": "true",
       "ART_TEST_RUN_TEST_2ND_ARCH": "false",
       "ART_USE_OPTIMIZING_COMPILER": "true",
       "JACK_REPOSITORY": "[SLAVE_BUILD]/prebuilts/sdk/tools/jacks",
       "JACK_SERVER": "false",
       "LEGACY_USE_JAVA7": "true",
       "PATH": "[SLAVE_BUILD]/out/host/linux-x86/bin:%(PATH)s",
       "TARGET_BUILD_TYPE": "release",
       "TARGET_BUILD_VARIANT": "eng",
       "TARGET_PRODUCT": "sdk"
     },
     "name": "test libcore"
   },
   {
     "cmd": [
       "[SLAVE_BUILD]/art/tools/run-jdwp-tests.sh",
       "--mode=host",
       "--variant=X64",
       "--debug"
     ],
-    "cwd": "[SLAVE_BUILD]",
     "env": {
       "ANDROID_BUILD_TOP": "[SLAVE_BUILD]",
       "ART_TEST_FULL": "false",
       "ART_TEST_INTERPRETER": "true",
       "ART_TEST_JIT": "true",
       "ART_TEST_KEEP_GOING": "true",
       "ART_TEST_OPTIMIZING": "true",
       "ART_TEST_RUN_TEST_2ND_ARCH": "false",
       "ART_USE_OPTIMIZING_COMPILER": "true",
       "JACK_REPOSITORY": "[SLAVE_BUILD]/prebuilts/sdk/tools/jacks",
       "JACK_SERVER": "false",
       "LEGACY_USE_JAVA7": "true",
       "PATH": "[SLAVE_BUILD]/out/host/linux-x86/bin:%(PATH)s",
       "TARGET_BUILD_TYPE": "release",
       "TARGET_BUILD_VARIANT": "eng",
       "TARGET_PRODUCT": "sdk"
     },
     "name": "test jdwp"
   },
   {
     "name": "$result",
     "recipe_result": null,
     "status_code": 0
   }
 ]