Removed test skipping for inspect_cfg
Removed test skipping for inspect_cfg

Since https://github.com/numba/llvmlite/pull/343 patched invalid
use of Twine, these tests should now pass.

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