GL: Update x86 package

* Fix issue where mesa_devel attempted to lay
  a symlink over a directory causing instability
  installing mesa_devel
* Add mesa_swpipe to repos (LLVM enabled Gallium softpipe)
GL: Update x86_gcc2 package

* Fix issue where mesa_devel attempted to lay
  a symlink over a directory causing instability
  installing mesa_devel