target-supports.exp (check-effective_target_vect_double): Enable for Power targets with VSX hardware available.

2015-08-27  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	* lib/target-supports.exp (check-effective_target_vect_double):
	Enable for Power targets with VSX hardware available.
	* gfortran.dg/vect/O3-pr49957.f: Replace vect_no_align with
	vect_no_align && { ! vect_hw_misalign }.

From-SVN: r227283