Add AVX feature detection from new llvm.workaround module.
Add AVX feature detection from new llvm.workaround module.

sklam/numba,ssarangi/numba,jriehl/numba,sklam/numba,gmarkall/numba,IntelLabs/numba,jriehl/numba,IntelLabs/numba,numba/numba,stonebig/numba,pombredanne/numba,gdementen/numba,pitrou/numba,stuartarchibald/numba,stefanseefeld/numba,ssarangi/numba,jriehl/numba,stefanseefeld/numba,pitrou/numba,gmarkall/numba,pombredanne/numba,stuartarchibald/numba,sklam/numba,stuartarchibald/numba,numba/numba,seibert/numba,seibert/numba,seibert/numba,cpcloud/numba,shiquanwang/numba,cpcloud/numba,GaZ3ll3/numba,numba/numba,IntelLabs/numba,cpcloud/numba,shiquanwang/numba,gdementen/numba,ssarangi/numba,pombredanne/numba,GaZ3ll3/numba,seibert/numba,jriehl/numba,GaZ3ll3/numba,gmarkall/numba,pitrou/numba,stonebig/numba,pombredanne/numba,numba/numba,sklam/numba,sklam/numba,stefanseefeld/numba,shiquanwang/numba,gdementen/numba,ssarangi/numba,gdementen/numba,pitrou/numba,GaZ3ll3/numba,stonebig/numba,IntelLabs/numba,stuartarchibald/numba,stefanseefeld/numba,pombredanne/numba,numba/numba,stonebig/numba,cpcloud/numba,seibert/numba,IntelLabs/numba,stonebig/numba,GaZ3ll3/numba,gmarkall/numba,gmarkall/numba,ssarangi/numba,gdementen/numba,stuartarchibald/numba,stefanseefeld/numba,pitrou/numba,jriehl/numba,cpcloud/numba