Bug#672546: xserver-xorg-video-openchrome: FTBFS on hurd-i386: unconditional libdrm requirement

[Gabriele Giacone <1o5g4r8o@gmail.com>]

On irc, I was told to send patches to xorg-devel@ to get them reviewed.

http://www.x.org/wiki/Development/Documentation/SubmittingPatches/

Then I noticed header I add has already been unconditionally added in
upstream master so my part is useless.

http://cgit.freedesktop.org/openchrome/xf86-video-openchrome/commit/?id=12c4cb9d393e1620bfbf2e5f9ba8c6d30d3dc534

Pino, could you please send yours yourself?
Once applied, we can backport them.

-- 
G..e