Add git cherry picking extension

man/src/git-cherry-pick-upload.txt

Index: man/src/git-cherry-pick-upload.txt
diff --git a/man/src/git-cherry-pick-upload.txt b/man/src/git-cherry-pick-upload.txt
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+git-cherry-pick-upload(1)
+=============
+
+NAME
+----
+git-cherry-pick-upload -
+include::_git-cherry-pick-upload_desc.helper.txt[]
+
+SYNOPSIS
+--------
+[verse]
+'git cherry-pick-upload' --branch <remote_branch_name> <commit_hash>
+
+DESCRIPTION
+-----------
+
+`git cherry-pick-upload` is used to upload a cherry pick to rietveld. It uses
+your view of the remote to generate the diff between a revision and its parent,
+and then uploads that diff to rietveld.
+
+The commit message is annotated with "(cherry picked from commit [parent sha1])"
+as if it were generated by `git cherry-pick -x`.
+
+EXAMPLE
+-------
+demo:1[]
+
+SEE ALSO
+--------
+linkgit:git-cherry-pick[1]
+linkgit:git-cl-upload[1]
+
+include::_footer.txt[]
+
+// vim: ft=asciidoc: