testsuite: fix dg-require-* order vs dg-additional-sources

Per gccint, 'dg-require-*' must come before any
'dg-additional-sources' directives. Fix a handful of deviant cases.

	* gcc.dg/tree-prof/crossmodule-indir-call-topn-1.c: Fix dg-require-profiling
	directive order.
	* gcc.dg/tree-prof/crossmodule-indir-call-topn-2.c: Likewise.