Add test for issue4690 and some code to check the number of statements in the init_block.
Add test for issue4690 and some code to check the number of statements in the init_block.

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