mesa: fix Multilib QA Issue

mesa: fix Multilib QA Issue

This patch fixed warning:
WARNING: Multilib QA Issue: lib32-mesa package lib32-mesa-megadriver - suspicious values
'mesa-driver-swrast mesa-driver-nouveau-vieux mesa-driver-r200 mesa-driver-i915 mesa-driver-radeon mesa-driver-i965' in RPROVIDES
WARNING: Multilib QA Issue: lib32-mesa package lib32-mesa-megadriver - suspicious values
'mesa-driver-swrast mesa-driver-nouveau-vieux mesa-driver-r200 mesa-driver-i915 mesa-driver-radeon mesa-driver-i965' in RREPLACES
WARNING: Multilib QA Issue: lib32-mesa package lib32-mesa-megadriver - suspicious values
'mesa-driver-swrast mesa-driver-nouveau-vieux mesa-driver-r200 mesa-driver-i915 mesa-driver-radeon mesa-driver-i965' in RCONFLICTS

Signed-off-by: Chong Lu <Chong.Lu@windriver.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>