* final.c (output_addr_const): Use target opening and
	closing parentheses.
	* target-def.h: Define TARGET_ASM_OPEN_PAREN, TARGET_ASM_CLOSE_PAREN
	defaults, add to TARGET_ASM_OUT.
	* target.h (struct gcc_target): Add open_paren and close_paren.
	* doc/md.texi: Update.
	* doc/tm.texi: Document TARGET_ASM_FUNCTION_END_PROLOGUE,
	TARGET_ASM_FUNCTION_BEGIN_EPILOGUE, TARGET_ASM_OPEN_PAREN and
	TARGET_ASM_CLOSE_PAREN.
config:
	* i386/i386.c (TARGET_ASM_OPEN_PAREN, TARGET_ASM_CLOSE_PAREN):
	Override.
	* pdp11/pdp11.c (TARGET_ASM_OPEN_PAREN, TARGET_ASM_CLOSE_PAREN):
	Override.
	* 1750a/1750a.h (ASM_OPEN_PAREN, ASM_CLOSE_PAREN): Remove.
	* a29k/a29k.h: Similarly.
	* alpha/alpha.h: Similarly.
	* arc/arc.h: Similarly.
	* arm/aof.h: Similarly.
	* arm/aout.h: Similarly.
	* avr/avr.h: Similarly.
	* c4x/c4x.h: Similarly.
	* clipper/clipper.h: Similarly.
	* convex/convex.h: Similarly.
	* d30v/d30v.h: Similarly.
	* dsp16xx/dsp16xx.h: Similarly.
	* elxsi/elxsi.h: Similarly.
	* fr30/fr30.h: Similarly.
	* h8300/h8300.h: Similarly.
	* i370/i370.h: Similarly.
	* i386/i386.h: Similarly.
	* i860/i860.h: Similarly.
	* i960/i960.h: Similarly.
	* ia64/ia64.h: Similarly.
	* m32r/m32r.h: Similarly.
	* m68hc11/m68hc11.h: Similarly.
	* m68k/m68k.h: Similarly.
	* m88k/m88k.h: Similarly.
	* mcore/mcore.h: Similarly.
	* mips/mips.h: Similarly.
	* mn10200/mn10200.h: Similarly.
	* mn10300/mn10300.h: Similarly.
	* ns32k/ns32k.h: Similarly.
	* pa/pa.h: Similarly.
	* pdp11/pdp11.h: Similarly.
	* pj/pj.h: Similarly.
	* romp/romp.h: Similarly.
	* rs6000/rs6000.h: Similarly.
	* sh/sh.h: Similarly.
	* sparc/sparc.h: Similarly.
	* v850/v850.h: Similarly.
	* vax/vax.h: Similarly.
	* we32k/we32k.h: Similarly.

From-SVN: r43856