Enable Subzero on ChromeOS
Enable Subzero on ChromeOS

Switching SwiftShader on ChromeOS from LLVM to Subzero.

Change-Id: Ica9ac278272f99b94d365f03fbd7a4860ad3503d
Reviewed-on: https://swiftshader-review.googlesource.com/11309
Tested-by: Alexis Hétu <1c7141772178a7e80858c3db5052b328076f08f4@google.com>
Reviewed-by: Nicolas Capens <51edc787c30f24c4904e8ffbb5523c3a9f7a451d@google.com>

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