[Xcb] GIT repo split - please test

[James Cloos]

Clones worked except for:

git://git.freedesktop.org/git/xcb/xcb.git
git://git.freedesktop.org/git/xcb/xhcb.git

which are not found.

-JimC
-- 
James Cloos <cloos at jhcloos.com>         OpenPGP: 0xED7DAEA6