Define API connections to extension entry points added in previous
commits. Update entry points to use floating point arguments as
required by the extension.
Add get tokens for ARB_viewport_array state.
v2: Include review feedback.
v3 (idr): Fix 'make check'. Add missing Get infrastructure (some was
culled from other pathces).
Signed-off-by: Courtney Goeltzenleuchter <courtney@LunarG.com>
Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
