Modify app.yaml in the built AppRTC rather in src.

When I switched to prebuilt AppRTC, I forgot we need to modify the
built app.yaml rather the one in src. This used to work because we ran
grunt build after the copy (which copied the file I modified), but after
switching to pre-built we're effectively running grunt build _before_
the copy. This caused to write to a config file that
wasn't read by the server on startup.

We could also delete the code and just flip the flag during
packaging, but that seems tedious and error-prone.


Review URL: .
diff --git a/ b/
index e65dcb0..6d09953 100755
--- a/
+++ b/
@@ -46,7 +46,7 @@
                   target_dir, ignore=shutil.ignore_patterns('.svn', '.git'))
-  app_yaml_path = os.path.join(target_dir, 'src', 'app_engine', 'app.yaml')
+  app_yaml_path = os.path.join(target_dir, 'out', 'app_engine', 'app.yaml')