libgomp/testsuite – use 'stop' and 'dg-do run'

libgomp/testsuite – use 'stop' and 'dg-do run'

        libgomp/
        * testsuite/libgomp.fortran/target-simd.f90: Use stop not abort.
        * testsuite/libgomp.fortran/use_device_ptr-optional-1.f90:
        Ditto; add 'dg-do run' for torture testing.
        * testsuite/libgomp.fortran/lastprivate1.f90:  Add 'dg-do run'.
        * testsuite/libgomp.fortran/lastprivate2.f90: Ditto.
        * testsuite/libgomp.fortran/nestedfn4.f90: Ditto.
        * testsuite/libgomp.fortran/pr25219.f90: Ditto.
        * testsuite/libgomp.fortran/pr28390.f: Ditto.
        * testsuite/libgomp.fortran/pr35130.f90: Ditto.
        * testsuite/libgomp.fortran/pr90779.f90: Ditto.
        * testsuite/libgomp.fortran/task2.f90: Ditto.
        * testsuite/libgomp.fortran/taskgroup1.f90: Ditto.
        * testsuite/libgomp.fortran/taskloop1.f90: Ditto.
        * testsuite/libgomp.fortran/use_device_addr-1.f90: Ditto.
        * testsuite/libgomp.fortran/use_device_addr-2.f90: Ditto.
        * testsuite/libgomp.fortran/workshare1.f90: Ditto.
        * testsuite/libgomp.fortran/workshare2.f90: Ditto.

From-SVN: r277606