shader: Don't require ARB_gpu_shader5 on gles for certain texture gather operations
The GLES 3.1 standard already requires support for shadow samplers, components, and offsets, so it is not needed to specify the requirement for the extensions.
Closes: #40 (closed)
Out of the tests that pass on the softpipe host and fail when runing it through vtest/host:gles-softpipe this fixes the failures: dEQP-GLES31.functional.texture.gather.*
Signed-off-by: Gert Wollny gert.wollny@collabora.com
Edited by Gert Wollny