Remove support for openSUSE 11.4

Project Evergreen stopped supporting 11.4 in October and it's not feasible to
back-port the patches for the Xorg 2014-12-09 CVEs, so as a result we can no
longer provide pre-built packages for this distribution.  The genric binaries
can be used instead.

(cherry picked from commit f2079c0e421b9b951f4e6c72bcdeded8b804f1df)