Changed recipe_modules base paths to be abstract entities in their own right.

scripts/slave/recipes/android/appurify.expected/Android_Tests__amp__dbg__test_failure.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "[BUILD]/scripts/slave/bot_update.py",
       "--master",
       "chromium.fyi",
       "--builder",
       "Android Tests (amp)(dbg)",
@@ skipping 96 matching lines @@
       "[SLAVE_BUILD]/src/build/tree_truth.sh",
       "[SLAVE_BUILD]/src",
       "src"
     ],
     "name": "tree truth steps"
   },
   {
     "cmd": [
       "python",
       "-u",
-      "[BUILD]/scripts/slave/recipe_modules/gsutil/resources/gsutil_wrapper.py",
+      "RECIPE_MODULE[gsutil]/resources/gsutil_wrapper.py",
       "--",
       "[DEPOT_TOOLS]/gsutil.py",
       "--force-version",
       "4.7",
       "--",
       "cp",
       "gs://chromium-android/android_fyi_dbg/full-build-linux_4f4b02f6b7fa20a3a25682c457bbc8ad589c8a00.zip",
       "[SLAVE_BUILD]/src/out/build_product.zip"
     ],
     "name": "gsutil download_build_product"
@@ skipping 1058 matching lines @@
       "@@@STEP_LOG_LINE@json.output@    \"test_run_id\": \"12345abcde\"@@@",
       "@@@STEP_LOG_LINE@json.output@  }@@@",
       "@@@STEP_LOG_LINE@json.output@}@@@",
       "@@@STEP_LOG_END@json.output@@@"
     ]
   },
   {
     "cmd": [
       "python",
       "-u",
-      "[BUILD]/scripts/slave/recipe_modules/zip/resources/unzip.py"
+      "RECIPE_MODULE[zip]/resources/unzip.py"
     ],
     "name": "[upload logcat] unzip results for android_webview_unittests",
     "stdin": "{\"output\": \"[TMP_BASE]/amp_results_tmp_2/android_webview_unittests/unzipped_results\", \"use_python_zip\": false, \"zip_file\": \"[TMP_BASE]/amp_results_tmp_2/android_webview_unittests/results.zip\"}"
   },
   {
     "cmd": [
       "python",
       "-u",
-      "[BUILD]/scripts/slave/recipe_modules/gsutil/resources/gsutil_wrapper.py",
+      "RECIPE_MODULE[gsutil]/resources/gsutil_wrapper.py",
       "--",
       "[DEPOT_TOOLS]/gsutil.py",
       "--force-version",
       "3.25",
       "--",
       "cp",
       "[TMP_BASE]/amp_results_tmp_2/android_webview_unittests/unzipped_results/appurify_results/logcat.txt",
       "gs://chrome-amp-results/logcats/logcat_android_webview_unittests_12345abcde.txt"
     ],
     "name": "gsutil [upload logcat] android_webview_unittests",
@@ skipping 824 matching lines @@
     "~followup_annotations": [
       "@@@STEP_TEXT@on Foo Fone 1.2.3@@@"
     ]
   },
   {
     "name": "$final_result",
     "reason": "4 out of 24 aggregated steps failed. Failures: Step('[trigger] components_unittests') failed with return_code 1, Step('[collect] android_webview_unittests') failed with return_code 1, Step('[collect] base_unittests') failed with return_code 87, Step('[collect] cc_unittests') failed with return_code 88",
     "status_code": 1
   }
 ]