graphics/piglit: Update to latest upstream

Update to upstream. Patches comes from a MR opened upstream.
Remove opencl dependancy, I haven't try it yet and will be dealt with
in a futur update.
Remove wayland option, wayland is always needed now. piglit is a test
suite and we want to test everything, it's also not intented for users
to use but only developpers.

Reviewed by: x11 (zeising@)
Differential Revision: https://reviews.freebsd.org/D26396