Roll recipe dependencies (nontrivial).

scripts/slave/recipes/v8.expected/full_tryserver_v8_v8_win_rel_ng.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_PACKAGE_REPO[build]\\scripts\\slave\\kill_processes.py"
     ],
     "name": "taskkill"
   },
   {
@@ skipping 68 matching lines @@
       "[SLAVE_BUILD]\\v8\\tools\\swarming_client\\swarming.py",
       "--version"
     ],
     "name": "swarming.py --version",
     "stdout": "/path/to/tmp/",
     "~followup_annotations": [
       "@@@STEP_TEXT@0.8.6@@@"
     ]
   },
   {
-    "cmd": [],
     "name": "ensure_goma"
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[depot_tools::cipd]\\resources\\bootstrap.py",
       "--platform",
       "windows-386",
       "--dest-directory",
@@ skipping 240 matching lines @@
     ],
     "name": "isolate tests",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@json.output@{@@@",
       "@@@STEP_LOG_LINE@json.output@  \"bot_default\": \"[dummy hash for bot_default]\"@@@",
       "@@@STEP_LOG_LINE@json.output@}@@@",
       "@@@STEP_LOG_END@json.output@@@"
     ]
   },
   {
-    "cmd": [],
     "name": "trigger",
     "trigger_specs": [
       {
         "builder_name": "v8_win_rel_ng_triggered",
         "properties": {
           "category": "cq",
           "issue": 12853011,
           "master": "tryserver.v8",
           "parent_build_environment": {
             "GYP_DEFINES": "target_arch=x64 cool_flag=a=1"
@@ skipping 17 matching lines @@
     "~followup_annotations": [
       "@@@STEP_TEXT@v8_win_rel_ng_triggered@@@"
     ]
   },
   {
     "name": "$result",
     "recipe_result": null,
     "status_code": 0
   }
 ]