ios: fix iossim path

scripts/slave/recipe_modules/ios/example.expected/test_failure.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--master",
       "chromium.fake",
       "--builder",
       "ios",
@@ skipping 294 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            \"${ISOLATED_OUTDIR}\", \n            \"--xcode-version\", \n            \"<(xcode_version)\", \n            \"--iossim\", \n            \"src/xcodebuild/ninja-iossim/Debug/iossim\", \n            \"--platform\", \n            \"<(platform)\", \n            \"--version\", \n            \"<(version)\"\n          ], \n          \"files\": [\n            \"<(app_path)/\", \n            \"src/ios/build/bots/scripts/\", \n            \"src/xcodebuild/ninja-iossim/Debug/iossim\"\n          ]\n        }\n      }\n    ]\n  ]\n}",
+      "{\n  \"conditions\": [\n    [\n      \"OS == \\\"ios\\\"\", \n      {\n        \"variables\": {\n          \"command\": [\n            \"src/ios/build/bots/scripts/run.py\", \n            \"--app\", \n            \"<(app_path)\", \n            \"--out-dir\", \n            \"${ISOLATED_OUTDIR}\", \n            \"--xcode-version\", \n            \"<(xcode_version)\", \n            \"--iossim\", \n            \"[SLAVE_BUILD]/src/xcodebuild/ninja-iossim/Debug/iossim\", \n            \"--platform\", \n            \"<(platform)\", \n            \"--version\", \n            \"<(version)\"\n          ], \n          \"files\": [\n            \"<(app_path)/\", \n            \"src/ios/build/bots/scripts/\", \n            \"[SLAVE_BUILD]/src/xcodebuild/ninja-iossim/Debug/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@            \"${ISOLATED_OUTDIR}\", @@@",
       "@@@STEP_LOG_LINE@template.isolate@            \"--xcode-version\", @@@",
       "@@@STEP_LOG_LINE@template.isolate@            \"<(xcode_version)\", @@@",
       "@@@STEP_LOG_LINE@template.isolate@            \"--iossim\", @@@",
-      "@@@STEP_LOG_LINE@template.isolate@            \"src/xcodebuild/ninja-iossim/Debug/iossim\", @@@",
+      "@@@STEP_LOG_LINE@template.isolate@            \"[SLAVE_BUILD]/src/xcodebuild/ninja-iossim/Debug/iossim\", @@@",
       "@@@STEP_LOG_LINE@template.isolate@            \"--platform\", @@@",
       "@@@STEP_LOG_LINE@template.isolate@            \"<(platform)\", @@@",
       "@@@STEP_LOG_LINE@template.isolate@            \"--version\", @@@",
       "@@@STEP_LOG_LINE@template.isolate@            \"<(version)\"@@@",
       "@@@STEP_LOG_LINE@template.isolate@          ], @@@",
       "@@@STEP_LOG_LINE@template.isolate@          \"files\": [@@@",
       "@@@STEP_LOG_LINE@template.isolate@            \"<(app_path)/\", @@@",
       "@@@STEP_LOG_LINE@template.isolate@            \"src/ios/build/bots/scripts/\", @@@",
-      "@@@STEP_LOG_LINE@template.isolate@            \"src/xcodebuild/ninja-iossim/Debug/iossim\"@@@",
+      "@@@STEP_LOG_LINE@template.isolate@            \"[SLAVE_BUILD]/src/xcodebuild/ninja-iossim/Debug/iossim\"@@@",
       "@@@STEP_LOG_LINE@template.isolate@          ]@@@",
       "@@@STEP_LOG_LINE@template.isolate@        }@@@",
       "@@@STEP_LOG_LINE@template.isolate@      }@@@",
       "@@@STEP_LOG_LINE@template.isolate@    ]@@@",
       "@@@STEP_LOG_LINE@template.isolate@  ]@@@",
       "@@@STEP_LOG_LINE@template.isolate@}@@@",
       "@@@STEP_LOG_END@template.isolate@@@"
     ]
   },
   {
@@ skipping 201 matching lines @@
       "@@@STEP_FAILURE@@@"
     ]
   },
   {
     "name": "$result",
     "reason": "Failed fake test (fake device iOS 8.1).",
     "recipe_result": null,
     "status_code": 1
   }
 ]