Add MPI_TEST to windows constants

Author: kshyatt

src/win_mpiconstants.jl

@@ -76,6 +76,7 @@ const MPI_IPROBE = (:MPI_IPROBE, "msmpi.dll")
 const MPI_PROBE = (:MPI_PROBE, "msmpi.dll")
 const MPI_COMM_FREE = (:MPI_COMM_FREE, "msmpi.dll")
 const MPI_GET_COUNT = (:MPI_GET_COUNT, "msmpi.dll")
+const MPI_TEST = (:MPI_TEST, "msmpi.dll")
 const MPI_TESTSOME = (:MPI_TESTSOME, "msmpi.dll")
 const MPI_TESTANY = (:MPI_TESTANY, "msmpi.dll")
 const MPI_TESTALL = (:MPI_TESTALL, "msmpi.dll")