test: Fix XPASS of RVV

test: Fix XPASS of RVV

XPASS: gcc.dg/vect/vect-outer-4e.c -flto -ffat-lto-objects  scan-tree-dump-times vect "OUTER LOOP VECTORIZED" 1
XPASS: gcc.dg/vect/vect-outer-4e.c scan-tree-dump-times vect "OUTER LOOP VECTORIZED" 1
XPASS: gcc.dg/vect/vect-outer-4f.c -flto -ffat-lto-objects  scan-tree-dump-times vect "OUTER LOOP VECTORIZED" 1
XPASS: gcc.dg/vect/vect-outer-4f.c scan-tree-dump-times vect "OUTER LOOP VECTORIZED" 1
XPASS: gcc.dg/vect/vect-outer-4g.c -flto -ffat-lto-objects  scan-tree-dump-times vect "OUTER LOOP VECTORIZED" 1
XPASS: gcc.dg/vect/vect-outer-4g.c scan-tree-dump-times vect "OUTER LOOP VECTORIZED" 1
XPASS: gcc.dg/vect/vect-outer-4k.c -flto -ffat-lto-objects  scan-tree-dump-times vect "OUTER LOOP VECTORIZED" 1
XPASS: gcc.dg/vect/vect-outer-4k.c scan-tree-dump-times vect "OUTER LOOP VECTORIZED" 1
XPASS: gcc.dg/vect/vect-outer-4l.c -flto -ffat-lto-objects  scan-tree-dump-times vect "OUTER LOOP VECTORIZED" 1
XPASS: gcc.dg/vect/vect-outer-4l.c scan-tree-dump-times vect "OUTER LOOP VECTORIZED" 1

Like ARM SVE, Fix these XPASS for RVV.

gcc/testsuite/ChangeLog:

	* gcc.dg/vect/vect-double-reduc-5.c: Add riscv.
	* gcc.dg/vect/vect-outer-4e.c: Ditto.
	* gcc.dg/vect/vect-outer-4f.c: Ditto.
	* gcc.dg/vect/vect-outer-4g.c: Ditto.
	* gcc.dg/vect/vect-outer-4k.c: Ditto.
	* gcc.dg/vect/vect-outer-4l.c: Ditto.