fix macos swiftshader build (#2971)

.github/workflows/macos-x64-gpu.yml

@@ -83,6 +83,10 @@ jobs:
       if: steps.cache-swiftshader.outputs.cache-hit != 'true'
       run: |
         cd swiftshader
+
+        # workaround ar build issue on macos
+        sed -i -e 's!^  for (const auto b : work_list) {$!  for (const auto\& b : work_list) {!' third_party/SPIRV-Tools/source/cfa.h
+
         mkdir -p build; cd build
         cmake -DCMAKE_INSTALL_PREFIX=install -DSWIFTSHADER_BUILD_EGL=FALSE -DSWIFTSHADER_BUILD_GLESv2=FALSE -DSWIFTSHADER_BUILD_GLES_CM=FALSE -DSWIFTSHADER_BUILD_VULKAN=TRUE -DSWIFTSHADER_BUILD_PVR=FALSE -DSWIFTSHADER_BUILD_TESTS=FALSE -DSWIFTSHADER_ENABLE_ASTC=FALSE -DSWIFTSHADER_WARNINGS_AS_ERRORS=FALSE -DREACTOR_BACKEND=Subzero -DREACTOR_DEFAULT_OPT_LEVEL=Default -DCMAKE_BUILD_TYPE=Release ..
         cmake --build . -j 2