nios2.c (nios2_asm_file_end): Implement TARGET_ASM_FILE_END hook for adding .note...

nios2.c (nios2_asm_file_end): Implement TARGET_ASM_FILE_END hook for adding .note.GNU-stack section when needed.

2015-01-20  Chung-Lin Tang  <cltang@codesourcery.com>

	gcc/
	* config/nios2/nios2.c (nios2_asm_file_end): Implement
	TARGET_ASM_FILE_END hook for adding .note.GNU-stack section when
	needed.
	(TARGET_ASM_FILE_END): Define.

	libgcc/
	* config/nios2/linux-unwind.h (nios2_fallback_frame_state):
	Update rt_sigframe format and address for current Nios II
	Linux conventions.

From-SVN: r219898