SSP-2695 Grant exec permissions on two MSSQL procs

In theory this shouldn't be necessary, but for consistency
we're setting up exec grants for the operational ssp database
user on all our SQLServer stored procs. Previously two of
our procs had these grants and two didn't. This adds grants
for the latter:

  update_directory_person_from_view_where_school_id
  update_directory_person_from_view_where_person_id