Add threading layer selection debug
Add threading layer selection debug

numba/numba,gmarkall/numba,IntelLabs/numba,jriehl/numba,stonebig/numba,cpcloud/numba,gmarkall/numba,IntelLabs/numba,stonebig/numba,seibert/numba,stonebig/numba,sklam/numba,stuartarchibald/numba,seibert/numba,jriehl/numba,IntelLabs/numba,numba/numba,jriehl/numba,stonebig/numba,sklam/numba,numba/numba,stuartarchibald/numba,jriehl/numba,cpcloud/numba,seibert/numba,gmarkall/numba,IntelLabs/numba,gmarkall/numba,cpcloud/numba,gmarkall/numba,stuartarchibald/numba,jriehl/numba,sklam/numba,stonebig/numba,stuartarchibald/numba,numba/numba,seibert/numba,seibert/numba,sklam/numba,numba/numba,cpcloud/numba,sklam/numba,stuartarchibald/numba,cpcloud/numba,IntelLabs/numba