Roll recipe dependencies (nontrivial).

scripts/slave/recipes/infra/try_recipe.expected/recursion.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--master",
       "tryserver.infra",
       "--builder",
       "recipe_try",
@@ skipping 13 matching lines @@
       "1",
       "--rietveld_server",
       "https://codereview.chromium.org",
       "--output_json",
       "/path/to/tmp/json",
       "--revision",
       "build@HEAD",
       "--force",
       "--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\": \"HEAD\"@@@",
@@ skipping 18 matching lines @@
       "@@@SET_BUILD_PROPERTY@got_revision_cp@\"refs/heads/master@{#270553}\"@@@"
     ]
   },
   {
     "cmd": [
       "python",
       "-u",
       "[SLAVE_BUILD]/build/scripts/slave/recipes.py",
       "fetch"
     ],
-    "cwd": "[SLAVE_BUILD]",
     "name": "fetch recipe engine deps"
   },
   {
     "cmd": [],
-    "cwd": "[SLAVE_BUILD]",
     "name": "properties (1)",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@properties@{@@@",
       "@@@STEP_LOG_LINE@properties@  \"buildername\": \"recipe_try\", @@@",
       "@@@STEP_LOG_LINE@properties@  \"buildnumber\": 571, @@@",
       "@@@STEP_LOG_LINE@properties@  \"mastername\": \"tryserver.infra\", @@@",
       "@@@STEP_LOG_LINE@properties@  \"slavename\": \"TestSlavename\", @@@",
       "@@@STEP_LOG_LINE@properties@  \"try_level\": 2, @@@",
       "@@@STEP_LOG_LINE@properties@  \"try_props\": \"eNqrViooyi8wVLJSUCpLzClNNVTSUQALGcGFjJRqAeKlC4s=\", @@@",
       "@@@STEP_LOG_LINE@properties@  \"try_recipe\": \"infra/build_repo_real_try\"@@@",
@@ skipping 10 matching lines @@
       "--base-level",
       "2",
       "--use-python-executable",
       "--",
       "[SLAVE_BUILD]/build/scripts/slave/recipes.py",
       "run",
       "--properties-file",
       "{\"buildername\": \"recipe_try\", \"buildnumber\": 571, \"mastername\": \"tryserver.infra\", \"slavename\": \"TestSlavename\", \"try_level\": 2, \"try_props\": \"eNqrViooyi8wVLJSUCpLzClNNVTSUQALGcGFjJRqAeKlC4s=\", \"try_recipe\": \"infra/build_repo_real_try\"}",
       "infra/try_other_recipe"
     ],
-    "cwd": "[SLAVE_BUILD]",
     "name": "infra.try_other_recipe run"
   },
   {
     "name": "$result",
     "recipe_result": null,
     "status_code": 0
   }
 ]