Fortran/OpenMP: Add support for 'close' in map clause gcc/fortran/ChangeLog: * openmp.c (gfc_match_omp_clauses): Support map-type-modifier 'close'. gcc/testsuite/ChangeLog: * gfortran.dg/gomp/map-6.f90: New test. * gfortran.dg/gomp/map-7.f90: New test. * gfortran.dg/gomp/map-8.f90: New test. (cherry picked from commit cdcec2f8505ea12c2236cf0184d77dd2f5de4832)