[gclient] Specify which DEPS is still using `use_relative_hooks`.

Bug:1107325, 1340011
Change-Id: I90bce90cba2ccf2a37b703b9bad49b5f79cfde33
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/3738359Reviewed-by: Aravind Vasudevan <aravindvasudev@google.com>
Commit-Queue: Joanna Wang <jojwang@chromium.org>

gclient.py

@@ -823,8 +823,9 @@ class Dependency(gclient_utils.WorkItem, DependencySettings):
 
     # compute which working directory should be used for hooks
     if local_scope.get('use_relative_hooks', False):
-      print('use_relative_hooks is deprecated, please remove it from DEPS. ' +
-            '(it was merged in use_relative_paths)', file=sys.stderr)
+      print('use_relative_hooks is deprecated, please remove it from '
+            '%s DEPS. (it was merged in use_relative_paths)' % self.name,
+            file=sys.stderr)
 
     hooks_cwd = self.root.root_dir
     if self._use_relative_paths: