Fix gdb discovery
Fix gdb discovery

As title

IntelLabs/numba,numba/numba,IntelLabs/numba,IntelLabs/numba,numba/numba,numba/numba,IntelLabs/numba,cpcloud/numba,cpcloud/numba,cpcloud/numba,cpcloud/numba,cpcloud/numba,numba/numba,numba/numba,IntelLabs/numba