nios2.md (trap, ctrapsi4): Use "trap" instead of "break".

2015-05-12 Sandra Loosemore <sandra@codesourcery.com>

	gcc/
	* config/nios2/nios2.md (trap, ctrapsi4): Use "trap" instead of
	"break".

	gcc/testsuite/
	* gcc.target/nios2/nios2-trap-insn.c: Expect "trap" instead of
	"break".
	* gcc.target/nios2/nios2-stack-check-1.c: Likewise.

From-SVN: r223083