New functions added by GL_ARB_sample_shading:
glMinSampleShadingARB()
New enums:
GL_SAMPLE_SHADING_ARB
GL_MIN_SAMPLE_SHADING_VALUE_ARB
V2: Update comments.
Create new GL4x.xml.
Remove redundant code in get.c.
Update the API_XML list in Makefile.am.
Add extra_gl40_ARB_sample_shading predicate to get.c.
V3:
Fix make check failure.
Add checks for desktop GL.
Use GLfloat in place of GLclampf in glMinSampleShading().
Signed-off-by: Anuj Phogat <anuj.phogat@gmail.com>
Reviewed-by: Ken Graunke <kenneth@whitecape.org>
