OpenACC 1.0 fortran FE support -- tests.

     gcc/testsuite/gfortran.dg/goacc/
     * assumed.f95: New test
     * branch.f95: Likewise
     * coarray.f95: Likewise
     * continuation-free-form.f95: Likewise
     * cray.f95: Likewise
     * critical.f95: Likewise
     * data-clauses.f95: Likewise
     * data-tree.f95: Likewise
     * declare-1.f95: Likewise
     * enter-exit-data.f95: Likewise
     * goacc.exp: Likewise
     * host_data-tree.f95: Likewise
     * if.f95: Likewise
     * kernels-tree.f95: Likewise
     * list.f95: Likewise
     * literal.f95: Likewise
     * loop-1.f95: Likewise
     * loop-2.f95: Likewise
     * loop-3.f95: Likewise
     * omp.f95: Likewise
     * parallel-kernels-clauses.f95: Likewise
     * parallel-kernels-regions.f95: Likewise
     * parallel-tree.f95: Likewise
     * parameter.f95: Likewise
     * pure-elemental-procedures.f95: Likewise
     * reduction.f95: Likewise
     * sentinel-free-form.f95: Likewise
     * several-directives.f95: Likewise
     * sie.f95: Likewise