Call UpdateSubmoduleConfig() in unmanaged mode, too.

Review URL: https://chromiumcodereview.appspot.com/10635010

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@143474 0039d316-1c4b-4281-b951-d872f2087c98

gclient_scm.py

@@ -279,6 +279,7 @@ class GitWrapper(SCMWrapper):
       return
 
     if not managed:
+      self.UpdateSubmoduleConfig()
       print ('________ unmanaged solution; skipping %s' % self.relpath)
       return