Add the patchset id to the manual commit messages

Context is here:
https://groups.google.com/a/chromium.org/d/msg/chromium-dev/M7f9VTqrR8w/RECOX2Y5YasJ

Review URL: https://codereview.chromium.org/513763002

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@291687 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/git_cl.py b/git_cl.py
index 063e9c5..8be3120 100755
--- a/git_cl.py
+++ b/git_cl.py
@@ -2053,8 +2053,8 @@
     cl.CloseIssue()
     props = cl.GetIssueProperties()
     patch_num = len(props['patchsets'])
-    comment = "Committed patchset #%d%s manually as %s" % (
-        patch_num, to_pending, revision)
+    comment = "Committed patchset #%d (id:%d)%s manually as %s" % (
+        patch_num, props['patchsets'][-1], to_pending, revision)
     if options.bypass_hooks:
       comment += ' (tree was closed).' if GetTreeStatus() == 'closed' else '.'
     else: