Fix AutoFDO tests to not look for hot/cold splitting.

Fix AutoFDO tests to not look for hot/cold splitting.

AutoFDO counts are not reliable and we are currently not
performing hot/cold splitting based on them. This change adjusts
several tree-prof tests not to check for hot/cold splitting
when run with AutoFDO.

gcc/testsuite/ChangeLog:

	* gcc.dg/tree-prof/cold_partition_label.c: Don't check for hot/cold splitting with AutoFDO.
	* gcc.dg/tree-prof/section-attr-1.c: Don't check for hot/cold splitting with AutoFDO.
	* gcc.dg/tree-prof/section-attr-2.c: Don't check for hot/cold splitting with AutoFDO.
	* gcc.dg/tree-prof/section-attr-3.c: Don't check for hot/cold splitting with AutoFDO.