[testsuite] Add missing require-effective-target directives in gcc.dg

Add some missing require-effect-targets directives (alloca, indirect_jumps,
label_values and nonlocal_goto).

Tested on nvptx.

gcc/testsuite/ChangeLog:

	* gcc.dg/Warray-bounds-46.c: Add missing require-effective-target
	directive.
	* gcc.dg/Warray-bounds-48.c: Same.
	* gcc.dg/Warray-bounds-50.c: Same.
	* gcc.dg/Wreturn-local-addr-2.c: Same.
	* gcc.dg/Wreturn-local-addr-3.c: Same.
	* gcc.dg/Wreturn-local-addr-4.c: Same.
	* gcc.dg/Wreturn-local-addr-6.c: Same.
	* gcc.dg/Wstack-usage.c: Same.
	* gcc.dg/Wstringop-overflow-15.c: Same.
	* gcc.dg/Wstringop-overflow-23.c: Same.
	* gcc.dg/Wstringop-overflow-25.c: Same.
	* gcc.dg/Wstringop-overflow-27.c: Same.
	* gcc.dg/Wstringop-overflow-39.c: Same.
	* gcc.dg/analyzer/alloca-leak.c: Same.
	* gcc.dg/analyzer/data-model-1.c: Same.
	* gcc.dg/analyzer/data-model-16.c: Same.
	* gcc.dg/analyzer/malloc-1.c: Same.
	* gcc.dg/analyzer/malloc-paths-8.c: Same.
	* gcc.dg/analyzer/pr93546.c: Same.
	* gcc.dg/analyzer/setjmp-1.c: Same.
	* gcc.dg/analyzer/setjmp-2.c: Same.
	* gcc.dg/analyzer/setjmp-3.c: Same.
	* gcc.dg/analyzer/setjmp-4.c: Same.
	* gcc.dg/analyzer/setjmp-5.c: Same.
	* gcc.dg/analyzer/setjmp-6.c: Same.
	* gcc.dg/analyzer/setjmp-7.c: Same.
	* gcc.dg/analyzer/setjmp-7a.c: Same.
	* gcc.dg/analyzer/setjmp-8.c: Same.
	* gcc.dg/analyzer/setjmp-9.c: Same.
	* gcc.dg/analyzer/setjmp-pr93378.c: Same.
	* gcc.dg/gimplefe-44.c: Same.
	* gcc.dg/pr84131.c: Same.
	* gcc.dg/pr93986.c: Same.
	* gcc.dg/pr95133.c: Same.
	* gcc.dg/pr95857.c: Same.
	* gcc.dg/strlenopt-83.c: Same.
	* gcc.dg/strlenopt-84.c: Same.
	* gcc.dg/strlenopt-91.c: Same.
	* gcc.dg/uninit-32.c: Same.
	* gcc.dg/uninit-36.c: Same.