depot_tools: expose path to gsutil.py

recipe_modules/depot_tools/api.py

Index: recipe_modules/depot_tools/api.py
diff --git a/recipe_modules/depot_tools/api.py b/recipe_modules/depot_tools/api.py
index 946a5d85e8b613fcbdd57374f2fe7e59f6a01a8c..b73cd580ffb43db96d30d9353a56361a9226fd98 100644
--- a/recipe_modules/depot_tools/api.py
+++ b/recipe_modules/depot_tools/api.py
@@ -10,6 +10,10 @@ class DepotToolsApi(recipe_api.RecipeApi):
     return self.package_repo_resource('download_from_google_storage.py')
 
   @property
+  def gsutil_py_path(self):
+    return self.package_repo_resource('gsutil.py')
+
+  @property
   def ninja_path(self):
     ninja_exe = 'ninja.exe' if self.m.platform.is_win else 'ninja'
     return self.package_repo_resource(ninja_exe)