Adjust vector dump scans

Adjust vector dump scans

The following adjusts dump scanning for something followed by
successful vector analysis to more specifically look for
'Analysis succeeded' and not 'Analysis failed' because the
previous look for just 'succeeded' or 'failed' is easily confused
by SLP discovery dumping those words.

	* tree-vect-loop.cc (vect_analyze_loop_1): Avoid extra space
	before 'failed'.

	* gcc.dg/vect/no-scevccp-outer-7.c: Adjust scanning for
	succeeded analysis not interrupted by failure.
	* gcc.dg/vect/no-scevccp-vect-iv-3.c: Likewise.
	* gcc.dg/vect/vect-cond-reduc-4.c: Likewise.
	* gcc.dg/vect/vect-live-2.c: Likewise.
	* gcc.dg/vect/vect-outer-4c-big-array.c: Likewise.
	* gcc.dg/vect/vect-reduc-dot-s16a.c: Likewise.
	* gcc.dg/vect/vect-reduc-dot-s8a.c: Likewise.
	* gcc.dg/vect/vect-reduc-dot-s8b.c: Likewise.
	* gcc.dg/vect/vect-reduc-dot-u16a.c: Likewise.
	* gcc.dg/vect/vect-reduc-dot-u16b.c: Likewise.
	* gcc.dg/vect/vect-reduc-dot-u8a.c: Likewise.
	* gcc.dg/vect/vect-reduc-dot-u8b.c: Likewise.
	* gcc.dg/vect/vect-reduc-pattern-1a.c: Likewise.
	* gcc.dg/vect/vect-reduc-pattern-1b-big-array.c: Likewise.
	* gcc.dg/vect/vect-reduc-pattern-1c-big-array.c: Likewise.
	* gcc.dg/vect/vect-reduc-pattern-2a.c: Likewise.
	* gcc.dg/vect/vect-reduc-pattern-2b-big-array.c: Likewise.
	* gcc.dg/vect/wrapv-vect-reduc-dot-s8b.c: Likewise.