Squashed 'third_party/SPIRV-Headers/' changes from af64a9e82..204cd131c
Squashed 'third_party/SPIRV-Headers/' changes from af64a9e82..204cd131c

204cd131c Merge pull request #134 from Tobski/patch-1
e0adad52b Off-by-one errors
6045738ac Reserve a new block of 64 opcodes

git-subtree-dir: third_party/SPIRV-Headers
git-subtree-split: 204cd131c42b90d129073719f2766293ce35c081

bkaradzic/SwiftShader,bkaradzic/SwiftShader,bkaradzic/SwiftShader,google/swiftshader,google/swiftshader,bkaradzic/SwiftShader,bkaradzic/SwiftShader,google/swiftshader