Don't assume vect_multiple_sizes means 2 sizes

Don't assume vect_multiple_sizes means 2 sizes

Some tests assumed that there would only be 2 vector sizes if
vect_multiple_sizes, whereas for SVE there are three (SVE, 128-bit
and 64-bit).  This patch replaces scan-tree-dump-times with
scan-tree-dump for vect_multiple_sizes but keeps it for
!vect_multiple_sizes.

2017-11-09  Richard Sandiford  <richard.sandiford@linaro.org>
	    Alan Hayward  <alan.hayward@arm.com>
	    David Sherwood  <david.sherwood@arm.com>

gcc/testsuite/
	* gcc.dg/vect/no-vfa-vect-101.c: Use scan-tree-dump rather than
	scan-tree-dump-times for vect_multiple_sizes.
	* gcc.dg/vect/no-vfa-vect-102.c: Likewise.
	* gcc.dg/vect/no-vfa-vect-102a.c: Likewise.
	* gcc.dg/vect/no-vfa-vect-37.c: Likewise.
	* gcc.dg/vect/no-vfa-vect-79.c: Likewise.
	* gcc.dg/vect/vect-104.c: Likewise.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r254591