* system.h: Poison old unused target macros.
	* config/dsp16xx.h (ASM_OPEN_PAREN, ASM_CLOSE_PAREN): Remove.
	* config/stormy16/stormy16.c: Update references to obsolete macros.
	* config/stormy16/stormy16.h: Similarly.
	* config/stormy16/stormy16.md: Similarly.
	* config/cris/cris.h: Similarly.

From-SVN: r46269