[Xcb] [PATCH 1/2 xcb-util] config: use the default xorg .gitignore file

[Arnaud Fontaine]

Hi,

    >  This will  save  future maintenance  when module  structure/tools
    > change.  This patch  depends on the util-common-m4 submodule patch
    > in the m4 path

Pushed, thanks.

Cheers,
--
Arnaud Fontaine