[Xorg] small Imakefiles patch

[Matthieu Herrb]

I've having troubles with the code that forces uses of the kbd driver on 
OpenBSD/amd64 (which uses DoLoadableServer NO). So I tried enabling 
UseDeprecatedKeyboardDriver and found out that make was bailing on 
incorrect Makefiles.

Don't use TABs to add white space in front of lines that are not 
comments. See Bugzilla #1132: 
<http://freedesktop.org/bugzilla/show_bug.cgi?id=1132>
-- 
					Matthieu