More fixes for SwarmBucket

infra/bots/recipes/swarm_trigger.expected/Infra-PerCommit.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "\nimport json\nimport sys\n\nwith open(sys.argv[1]) as f:\n  content = json.load(f)\n\nprint json.dumps(content, indent=2)\n",
       "{\"buildername\": \"Infra-PerCommit\", \"buildnumber\": 5, \"mastername\": \"client.skia\", \"path_config\": \"kitchen\", \"recipe\": \"swarm_trigger\", \"revision\": \"abc123\", \"slavename\": \"skiabot-linux-swarm-000\"}"
     ],
     "name": "print properties",
     "~followup_annotations": [
@@ skipping 157 matching lines @@
     "cmd": [
       "download_from_google_storage",
       "--no_resume",
       "--platform=linux*",
       "--no_auth",
       "--bucket",
       "chromium-luci",
       "-d",
       "[SLAVE_BUILD]/skia/infra/bots/tools/luci-go/linux64"
     ],
+    "env": {
+      "PATH": "RECIPE_PACKAGE_REPO[depot_tools]:%(PATH)s"
+    },
     "name": "download luci-go linux"
   },
   {
     "cmd": [
       "download_from_google_storage",
       "--no_resume",
       "--platform=darwin",
       "--no_auth",
       "--bucket",
       "chromium-luci",
       "-d",
       "[SLAVE_BUILD]/skia/infra/bots/tools/luci-go/mac64"
     ],
+    "env": {
+      "PATH": "RECIPE_PACKAGE_REPO[depot_tools]:%(PATH)s"
+    },
     "name": "download luci-go mac"
   },
   {
     "cmd": [
       "download_from_google_storage",
       "--no_resume",
       "--platform=win32",
       "--no_auth",
       "--bucket",
       "chromium-luci",
       "-d",
       "[SLAVE_BUILD]/skia/infra/bots/tools/luci-go/win64"
     ],
+    "env": {
+      "PATH": "RECIPE_PACKAGE_REPO[depot_tools]:%(PATH)s"
+    },
     "name": "download luci-go win"
   },
   {
     "cmd": [
       "python",
       "-u",
       "\nimport os, sys\nfrom common import chromium_utils # Error? See https://crbug.com/584783.\n\n\nif os.path.exists(sys.argv[1]):\n  chromium_utils.RemoveDirectory(sys.argv[1])\n",
       "[SLAVE_BUILD]/luci-go"
     ],
     "env": {
@@ skipping 231 matching lines @@
       "@@@STEP_LINK@shard #0 isolated out@blah@@@",
       "@@@STEP_LINK@view steps on Milo@https://luci-milo.appspot.com/swarming/task/148aa78d7aa0000@@@"
     ]
   },
   {
     "name": "$result",
     "recipe_result": null,
     "status_code": 0
   }
 ]