scons/windows: Support build with LLVM 11.
Added LLVMFrontendOpenMP. Removed LLVMX86Utils.
Signed-off-by: Vinson Lee vlee@freedesktop.org
cc: @jrfonseca @pal1000
Added LLVMFrontendOpenMP. Removed LLVMX86Utils.
Signed-off-by: Vinson Lee vlee@freedesktop.org
cc: @jrfonseca @pal1000