vect-28.c: Fix test to not expect peeling on !vector_alignment_reachable targets.

vect-28.c: Fix test to not expect peeling on !vector_alignment_reachable targets.

        * gcc.dg/vect/vect-28.c: Fix test to not expect peeling on
        !vector_alignment_reachable targets.
        * gcc.dg/vect/vect-33.c: Likewise.
        * gcc.dg/vect/vect-42.c: Likewise.
        * gcc.dg/vect/vect-44.c: Likewise.
        * gcc.dg/vect/vect-50.c: Likewise.
        * gcc.dg/vect/vect-70.c: Likewise.
        * gcc.dg/vect/vect-71.c: Likewise.
        * gcc.dg/vect/vect-87.c: Likewise.
        * gcc.dg/vect/vect-88.c: Likewise.
        * gcc.dg/vect/vect-91.c: Likewise.
        * gcc.dg/vect/vect-93.c: Likewise.
        * gcc.dg/vect/vect-96.c: Likewise.
        * gcc.dg/vect/no-section-anchors-69.c: Likewise.
        * gcc.dg/vect/section-anchors-69.c: Likewise.
        * gcc.dg/vect/pr25413.c: Likewise.
        * gcc.dg/vect/costmodel/ppc/costmodel-33.c: Likewise.
        * gcc.dg/vect/costmodel/ppc/costmodel-76b.c: Likewise.
        * gfortran.dg/vect-2.f90: Likewise.
        * gfortran.dg/vect-3.f90: Likewise.
        * gfortran.dg/vect-4.f90: Likewise.
        * gfortran.dg/vect-5.f90: Likewise.
        * lib/target-supports.exp (check_effective_target_natural_alignment):
        Return false for darwin.
        (check_effective_target_vector_alignment_reachable_for_double): New.

From-SVN: r127276