Roll third_party/spirv-headers/ 124a9665e..b8b9eb864 (3 commits)

KhronosGroup/SPIRV-Headers@124a966...b8b9eb8

$ git log 124a9665e..b8b9eb864 --date=short --no-merges --format='%ad %ae %s'
2023-08-16 viktoria.maksimova Headers support for two Intel extensions (#356)
2023-08-10 dneto Revert "Merge pull request #367 from dneto0/coop-matrix-enums-deps"
2023-07-29 konstantin.seurer Add SPV_AMDX_shader_enqueue

Created with:
  roll-dep third_party/spirv-headers

DEPS

@@ -10,7 +10,7 @@ vars = {
  'glslang_revision': 'c5117b328afc86e16edff6ed6afe0fe7872a7cf3',
  'googletest_revision': '9fce5480448488e17a50bcbf88d2f3bdb637ad6c',
  're2_revision': '08d338fe481fe19adde12fa24b014412d15bdfa0',
- 'spirv_headers_revision': '124a9665e464ef98b8b718d572d5f329311061eb',
+ 'spirv_headers_revision': 'b8b9eb8640c8c0107ba580fbcb10f969022ca32c',
  'spirv_tools_revision': '8e3da01b45806fbacbb9e6fce9c5f9ae49f60e42',
 }