Missing MPI_F08_STATUS[ES]_IGNORE in mpi.h

[jsquyres]

MPI-3.1 p657:43-48 states:

Two global variables of type MPI_F08_status*, MPI_F08_STATUS_IGNORE and MPI_F08_STATUSES_IGNORE are declared in mpi.h. They can be used to test, in C, whether f_status is the Fortran value of MPI_STATUS_IGNORE or MPI_STATUSES_IGNORE defined in the mpi_f08 module. These are global variables, not C constant expressions and cannot be used in places where C requires constant expressions. Their value is defined only between the calls to MPI_INIT and MPI_FINALIZE and should not be changed by user code.

OMPI is missing the declarations / definitions for MPI_F08_STATUS[ES]_IGNORE.

[ggouaillardet]

this is a duplicate of #1475
see my last two comments about the current issue.
basically, we cannot define MPI_F08_STATUS_IGNORE and have all the mangling flavors in the fortran library (and we do not have all of them today)