Add a manual page for git-cl

The most important git subcommand in depot_tools never had a man
page until today. And now "git help cl" and "git cl --help" will
work.

BUG=695623

Change-Id: Ic0d05fa8d70d2ef6e71d58e0d7d3e7adc4a2fa32
Reviewed-on: https://chromium-review.googlesource.com/447216
Reviewed-by: Robbie Iannucci <iannucci@chromium.org>
Commit-Queue: Aaron Gable <agable@chromium.org>
diff --git a/man/html/git-upstream-diff.html b/man/html/git-upstream-diff.html
index 1c15adb..0bedb98 100644
--- a/man/html/git-upstream-diff.html
+++ b/man/html/git-upstream-diff.html
@@ -891,7 +891,7 @@
 <div id="footnotes"><hr /></div>
 <div id="footer">
 <div id="footer-text">
-Last updated 2016-12-15 15:36:52 PST
+Last updated 2017-02-27 13:47:35 PST
 </div>
 </div>
 </body>