FYI: git-hooks update on sourceware.org

[Joel Brobecker]

> These changes have been extensively tested, and we've been using
> the same version at AdaCore for over a week, now; but do let me
> know if you have any issues.

Well, that didn't take long. Simon just emailed me about an error.
Apparently, the Python installed on sourceware.org doesn't have
the enum module installed.

I will revert the update, and ask overseers to install it.

-- 
Joel