Add error names for newly added MPI_T routines

See https://svn.mpi-forum.org/trac/mpi-forum-web/ticket/377

Signed-off-by: Antonio J. Pena <apenya@mcs.anl.gov>

src/mpi_t/errnames.txt

@@ -66,3 +66,9 @@
 **mpi_t_category_get_categories %d %d %p: MPI_T_category_get_categories(cat_index=%d, len=%d, indices=%p)
 **mpi_t_category_changed: MPI_T_category_changed failed
 **mpi_t_category_changed %p: MPI_T_category_changed(stamp=%p)
+**mpi_t_cvar_get_index: mpi_t_cvar_get_index failed
+**mpi_t_cvar_get_index %p %p: mpi_t_cvar_get_index(name=%p, cvar_index=%p)
+**mpi_t_pvar_get_index: mpi_t_pvar_get_index failed
+**mpi_t_pvar_get_index %p %d %p: mpi_t_pvar_get_index(name=%p, var_class=%d, pvar_index=%p)
+**mpi_t_category_get_index: mpi_t_category_get_index failed
+**mpi_t_category_get_index %p %p: mpi_t_category_get_index(name=%p, cat_index=%p)