ssa-dse-1.C: Don't match exact number of chars of = {} store.

ssa-dse-1.C: Don't match exact number of chars of = {} store.

	* g++.dg/tree-ssa/ssa-dse-1.C: Don't match exact number of chars of
	= {} store.
	* g++.dg/tree-ssa/pr31146.C: Change -fdump-tree-forwprop to
	-fdump-tree-forwprop1 in dg-options.  Expect <int[5]> in MEM.

From-SVN: r272240