testsuite: Fix up syntax error in scan-tree-dump-times target selector

testsuite: Fix up syntax error in scan-tree-dump-times target selector

On aarch64, powerpc64le and s390x-linux I'm seeing another syntax error
which didn't show up on x86_64-linux nor i686-linux:
ERROR: gcc.dg/vect/slp-perm-8.c -flto -ffat-lto-objects: error executing dg-final: syntax error in target selector "target  ! vect_load_lanes  && vect_partial_vectors_usage_1 &&  ! s390_vx"
ERROR: gcc.dg/vect/slp-perm-8.c: error executing dg-final: syntax error in target selector "target  ! vect_load_lanes  && vect_partial_vectors_usage_1 &&  ! s390_vx"

The following patch fixes that.

2023-03-05  Jakub Jelinek  <jakub@redhat.com>

	* gcc.dg/vect/slp-perm-8.c: Fix up syntax error in
	scan-tree-dump-times target selector.