Fixes #4565: Move r31523 to v1.8 branch (Allow MPI_MODE_NOPRECEDE | MPI_MODE_NOSUCCEED for)

---svn-pre-commit-ignore-below---

r31523 [[BR]]
Allow MPI_MODE_NOPRECEDE | MPI_MODE_NOSUCCEED for MPI_Win_fence

This combination does not make sense but is not explicitly forbidden by
the standard so remove the argument check for this combination.

cmr=v1.8.2:reviewer=jsquyres