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