Roll recipe dependencies (nontrivial).

scripts/slave/recipes/run_presubmit.expected/build_internal_scripts_slave.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--master",
       "tryserver.chromium.linux",
       "--builder",
       "build_internal_scripts_slave_presubmit",
@@ skipping 12 matching lines @@
       "--patchset",
       "1",
       "--rietveld_server",
       "https://codereview.chromium.org",
       "--output_json",
       "/path/to/tmp/json",
       "--revision",
       "build_internal/scripts/slave@HEAD",
       "--output_manifest"
     ],
-    "cwd": "[SLAVE_BUILD]",
     "env": {
       "PATH": "%(PATH)s:RECIPE_PACKAGE_REPO[depot_tools]"
     },
     "name": "bot_update",
     "~followup_annotations": [
       "@@@STEP_TEXT@Some step text@@@",
       "@@@STEP_LOG_LINE@json.output@{@@@",
       "@@@STEP_LOG_LINE@json.output@  \"did_run\": true, @@@",
       "@@@STEP_LOG_LINE@json.output@  \"fixed_revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"build_internal/scripts/slave\": \"HEAD\"@@@",
@@ skipping 62 matching lines @@
       "--verbose",
       "--skip_canned",
       "CheckRietveldTryJobExecution",
       "--skip_canned",
       "CheckTreeIsOpen",
       "--skip_canned",
       "CheckBuildbotPendingBuilds",
       "--upstream",
       "3faf12c8131337a86e669cc1a1bd8d2dfe8cc86d"
     ],
-    "cwd": "[SLAVE_BUILD]",
     "env": {
       "PATH": "%(PATH)s:RECIPE_PACKAGE_REPO[depot_tools]",
       "PYTHONPATH": ""
     },
     "name": "presubmit"
   },
   {
     "name": "$result",
     "recipe_result": null,
     "status_code": 0
   }
 ]