Presubmit: Always run recipe test and gen_tasks test on commit

infra/bots/recipes/swarm_presubmit.expected/presubmit.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "\nimport sys, os\npath = sys.argv[1]\nmode = int(sys.argv[2])\nif not os.path.isdir(path):\n  if os.path.exists(path):\n    print \"%s exists but is not a dir\" % path\n    sys.exit(1)\n  os.makedirs(path, mode)\n",
       "[CUSTOM_/_B_WORK]",
       "511"
     ],
     "name": "makedirs checkout_path",
@@ skipping 103 matching lines @@
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
       "PATH": "%(PATH)s:RECIPE_PACKAGE_REPO[depot_tools]:RECIPE_PACKAGE_REPO[depot_tools]:RECIPE_PACKAGE_REPO[depot_tools]:RECIPE_PACKAGE_REPO[depot_tools]",
       "SKIA_OUT": "[SLAVE_BUILD]/out"
     },
     "name": "gclient recurse (git config user.email)"
   },
   {
     "cmd": [
+      "python",
+      "-u",
+      "\nimport sys, os\npath = sys.argv[1]\nmode = int(sys.argv[2])\nif not os.path.isdir(path):\n  if os.path.exists(path):\n    print \"%s exists but is not a dir\" % path\n    sys.exit(1)\n  os.makedirs(path, mode)\n",
+      "[SLAVE_BUILD]/gopath",
+      "511"
+    ],
+    "name": "makedirs gopath",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@python.inline@@@@",
+      "@@@STEP_LOG_LINE@python.inline@import sys, os@@@",
+      "@@@STEP_LOG_LINE@python.inline@path = sys.argv[1]@@@",
+      "@@@STEP_LOG_LINE@python.inline@mode = int(sys.argv[2])@@@",
+      "@@@STEP_LOG_LINE@python.inline@if not os.path.isdir(path):@@@",
+      "@@@STEP_LOG_LINE@python.inline@  if os.path.exists(path):@@@",
+      "@@@STEP_LOG_LINE@python.inline@    print \"%s exists but is not a dir\" % path@@@",
+      "@@@STEP_LOG_LINE@python.inline@    sys.exit(1)@@@",
+      "@@@STEP_LOG_LINE@python.inline@  os.makedirs(path, mode)@@@",
+      "@@@STEP_LOG_END@python.inline@@@"
+    ]
+  },
+  {
+    "cmd": [
       "git",
       "status"
     ],
     "cwd": "[CUSTOM_/_B_WORK]/skia",
     "name": "git status"
   },
   {
     "cmd": [
       "RECIPE_PACKAGE_REPO[depot_tools]/presubmit_support.py",
       "--commit",
       "--upstream=HEAD^",
       "-v",
       "-v"
     ],
     "cwd": "[CUSTOM_/_B_WORK]/skia",
     "env": {
+      "GOPATH": "[SLAVE_BUILD]/gopath",
       "PATH": "RECIPE_PACKAGE_REPO[depot_tools]:%(PATH)s"
     },
     "name": "presubmit"
   },
   {
     "name": "$result",
     "recipe_result": null,
     "status_code": 0
   }
 ]