ios: fix iossim path

scripts/slave/recipes/ios/try.expected/swarming.json

 [
   {
     "cmd": [
       "RECIPE_PACKAGE_REPO[build]/scripts/slave/ios/host_info.py",
       "--json-file",
       "/path/to/tmp/json"
     ],
     "name": "host and tools info",
     "~followup_annotations": [
       "@@@STEP_TEXT@<br />OS X 1.2.3, Xcode 6.7.8 (5D342509a)@@@",
@@ skipping 420 matching lines @@
   },
   {
     "cmd": [],
     "name": "isolate"
   },
   {
     "cmd": [
       "python",
       "-u",
       "\nimport shutil\nimport sys\nshutil.copy(sys.argv[1], sys.argv[2])\n",
-      "{\n  \"conditions\": [\n    [\n      \"OS == \\\"ios\\\"\", \n      {\n        \"variables\": {\n          \"command\": [\n            \"src/ios/build/bots/scripts/run.py\", \n            \"--app\", \n            \"<(app_path)\", \n            \"--out-dir\", \n            \"${ISOLATED_OUTDIR}\", \n            \"--xcode-version\", \n            \"<(xcode_version)\", \n            \"--iossim\", \n            \"src/out/Debug-iphonesimulator/iossim\", \n            \"--platform\", \n            \"<(platform)\", \n            \"--version\", \n            \"<(version)\"\n          ], \n          \"files\": [\n            \"<(app_path)/\", \n            \"src/ios/build/bots/scripts/\", \n            \"src/out/Debug-iphonesimulator/iossim\"\n          ]\n        }\n      }\n    ]\n  ]\n}",
+      "{\n  \"conditions\": [\n    [\n      \"OS == \\\"ios\\\"\", \n      {\n        \"variables\": {\n          \"command\": [\n            \"src/ios/build/bots/scripts/run.py\", \n            \"--app\", \n            \"<(app_path)\", \n            \"--out-dir\", \n            \"${ISOLATED_OUTDIR}\", \n            \"--xcode-version\", \n            \"<(xcode_version)\", \n            \"--iossim\", \n            \"[BUILDER_CACHE]/ios_simulator_swarming/src/out/Debug-iphonesimulator/iossim\", \n            \"--platform\", \n            \"<(platform)\", \n            \"--version\", \n            \"<(version)\"\n          ], \n          \"files\": [\n            \"<(app_path)/\", \n            \"src/ios/build/bots/scripts/\", \n            \"[BUILDER_CACHE]/ios_simulator_swarming/src/out/Debug-iphonesimulator/iossim\"\n          ]\n        }\n      }\n    ]\n  ]\n}",
       "[SLAVE_BUILD]/template.isolate"
     ],
     "name": "isolate.generate template.isolate",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
       "@@@STEP_LOG_LINE@template.isolate@{@@@",
       "@@@STEP_LOG_LINE@template.isolate@  \"conditions\": [@@@",
       "@@@STEP_LOG_LINE@template.isolate@    [@@@",
       "@@@STEP_LOG_LINE@template.isolate@      \"OS == \\\"ios\\\"\", @@@",
       "@@@STEP_LOG_LINE@template.isolate@      {@@@",
       "@@@STEP_LOG_LINE@template.isolate@        \"variables\": {@@@",
       "@@@STEP_LOG_LINE@template.isolate@          \"command\": [@@@",
       "@@@STEP_LOG_LINE@template.isolate@            \"src/ios/build/bots/scripts/run.py\", @@@",
       "@@@STEP_LOG_LINE@template.isolate@            \"--app\", @@@",
       "@@@STEP_LOG_LINE@template.isolate@            \"<(app_path)\", @@@",
       "@@@STEP_LOG_LINE@template.isolate@            \"--out-dir\", @@@",
       "@@@STEP_LOG_LINE@template.isolate@            \"${ISOLATED_OUTDIR}\", @@@",
       "@@@STEP_LOG_LINE@template.isolate@            \"--xcode-version\", @@@",
       "@@@STEP_LOG_LINE@template.isolate@            \"<(xcode_version)\", @@@",
       "@@@STEP_LOG_LINE@template.isolate@            \"--iossim\", @@@",
-      "@@@STEP_LOG_LINE@template.isolate@            \"src/out/Debug-iphonesimulator/iossim\", @@@",
+      "@@@STEP_LOG_LINE@template.isolate@            \"[BUILDER_CACHE]/ios_simulator_swarming/src/out/Debug-iphonesimulator/iossim\", @@@",

[smut, 2016/08/10 23:53:32]

This is wrong. This command needs to use relative paths because the absolute
paths on the builder do not exist on Swarming.

       "@@@STEP_LOG_LINE@template.isolate@            \"--platform\", @@@",
       "@@@STEP_LOG_LINE@template.isolate@            \"<(platform)\", @@@",
       "@@@STEP_LOG_LINE@template.isolate@            \"--version\", @@@",
       "@@@STEP_LOG_LINE@template.isolate@            \"<(version)\"@@@",
       "@@@STEP_LOG_LINE@template.isolate@          ], @@@",
       "@@@STEP_LOG_LINE@template.isolate@          \"files\": [@@@",
       "@@@STEP_LOG_LINE@template.isolate@            \"<(app_path)/\", @@@",
       "@@@STEP_LOG_LINE@template.isolate@            \"src/ios/build/bots/scripts/\", @@@",
-      "@@@STEP_LOG_LINE@template.isolate@            \"src/out/Debug-iphonesimulator/iossim\"@@@",
+      "@@@STEP_LOG_LINE@template.isolate@            \"[BUILDER_CACHE]/ios_simulator_swarming/src/out/Debug-iphonesimulator/iossim\"@@@",
       "@@@STEP_LOG_LINE@template.isolate@          ]@@@",
       "@@@STEP_LOG_LINE@template.isolate@        }@@@",
       "@@@STEP_LOG_LINE@template.isolate@      }@@@",
       "@@@STEP_LOG_LINE@template.isolate@    ]@@@",
       "@@@STEP_LOG_LINE@template.isolate@  ]@@@",
       "@@@STEP_LOG_LINE@template.isolate@}@@@",
       "@@@STEP_LOG_END@template.isolate@@@"
     ]
   },
   {
@@ skipping 200 matching lines @@
       "@@@STEP_LOG_END@json.output@@@",
       "@@@STEP_LINK@shard #0@https://chromium-swarm.appspot.com/user/task/10000@@@"
     ]
   },
   {
     "name": "$result",
     "recipe_result": null,
     "status_code": 0
   }
 ]