Add support for VK_KHR_sampler_mirror_clamp_to_edge
Add support for VK_KHR_sampler_mirror_clamp_to_edge

google/gapid,google/gapid,google/gapid,pmuetschard/gapid,pmuetschard/gapid,pmuetschard/gapid,pmuetschard/gapid,google/agi,google/agi,google/gapid,pmuetschard/gapid,pmuetschard/gapid,google/agi,google/gapid,google/agi,google/agi,google/agi,google/gapid,google/agi,google/gapid,pmuetschard/gapid,google/agi,pmuetschard/gapid,google/gapid