qt4-x11-free: Only build opengl for x86 platforms since only these have GL support at present
[sgw@linux.intel.com: merged and fixed Signed-off-bys]
Signed-off-by: Jingdong Lu <jingdong.lu@windriver.com>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>