Log Message:
devel/git-cinnabar: Add patches to fix spurious git push success.

PKGREVISION++

(No change to devel/py-hg-cinnabarclone PKGREVISION even though the
patch also applies to it, because the patch doesn't change any of the
content of the py-hg-cinnabarclone package, which consists mainly of
one .py file in git-cinnabar.  The patch is applied merely for the
convenience of sharing distinfo between the two packages.)

Derived from the current state of:

https://github.com/glandium/git-cinnabar/pull/342