Add RENDERBUFFER_VALID bit to R8, RG8 definition
FBO completness tests missed that R8/RG8 are valid internal formats
for glRenderbufferStorage* calls starting from GLES3. This caused
the tests to expect error on some implementations.
VK-GL-CTS issue: 532
Components: AOSP
Affects:
dEQP-GLES2.functional.fbo.completeness.renderable.renderbuffer.color0.r8
dEQP-GLES2.functional.fbo.completeness.renderable.renderbuffer.color0.rg8
Change-Id: I394ac0e75f83f0a5ca03634629293f109fc0cbb7
(cherry picked from commit
1d7c8df82e40052467289e49dd5d20c39a229943)