vect-simd-clone-1[6-8][cd].c: Expect in-branch clones for x86

vect-simd-clone-1[6-8][cd].c: Expect in-branch clones for x86

Since the C frontend no longer promotes char and short arguments, expect
in-branch clones for x86.

	PR middle-end/112877
	* gcc.dg/vect/vect-simd-clone-16c.c: Expect in-branch clones for
	x86.
	* gcc.dg/vect/vect-simd-clone-16d.c: Likewise.
	* gcc.dg/vect/vect-simd-clone-17c.c: Likewise.
	* gcc.dg/vect/vect-simd-clone-17d.c: Likewise.
	* gcc.dg/vect/vect-simd-clone-18c.c: Likewise.
	* gcc.dg/vect/vect-simd-clone-18d.c: Likewise.

Signed-off-by: H.J. Lu <hjl.tools@gmail.com>