Fix some testcases for nds32 target and provide new nds32 target specific tests.

Fix some testcases for nds32 target and provide new nds32 target specific tests.

gcc/testsuite/
	* gcc.dg/20020312-2.c: Add __nds32__ case.
	* gcc.dg/builtin-apply2.c: Skip for nds32*-*-*.
	* gcc.dg/sibcall-3.c: Expected fail for nds32*-*-*.
	* gcc.dg/sibcall-4.c: Expected fail for nds32*-*-*.
	* gcc.dg/stack-usage-1.c (SIZE): Define case for __nds32__.
	* gcc.dg/torture/pr37868.c: Skip for nds32*-*-*.
	* gcc.dg/torture/stackalign/builtin-apply-2.c: Skip for nds32*-*-*.
	* gcc.dg/tree-ssa/20040204-1.c: Expected fail for nds32*-*-*.
	* gcc.dg/tree-ssa/pr42585.c: Skip for nds32*-*-*.
	* gcc.dg/tree-ssa/sra-12.c: Skip for nds32*-*-*.
	* gcc.target/nds32: New nds32 specific directory and testcases.
	* lib/target-supports.exp (check_profiling_available): Check for
	nds32*-*-elf.

From-SVN: r205625