Disallow assignments to arrays passed to stencil kernels.  Copy the stencil kernel IR manually so we can construct a calltypes that matches the new copy instead of the original IR.
Disallow assignments to arrays passed to stencil kernels.  Copy the stencil kernel IR manually so we can construct a calltypes that matches the new copy instead of the original IR.

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