Improved git cl patch generated commit message to include patchset information

git_cl.py

Index: git_cl.py
diff --git a/git_cl.py b/git_cl.py
index 48f6c26d4d8e7f729c5ca6c8d6951cc4ee05e226..bd17599384dc0320758afd7df94de2d08c3706e9 100755
--- a/git_cl.py
+++ b/git_cl.py
@@ -2370,7 +2370,9 @@ def PatchIssue(issue_arg, reject, nocommit, directory):
 
   # If we had an issue, commit the current state and register the issue.
   if not nocommit:
-    RunGit(['commit', '-m', 'patch from issue %s' % issue])
+    RunGit(['commit', '-m', ('patch from issue %(i)s at patchset '
+                             '%(p)s (http://crrev.com/%(i)s#ps%(p)s)'
+                             % {'i': issue, 'p': patchset})])
     cl = Changelist()
     cl.SetIssue(issue)
     cl.SetPatchset(patchset)