t-m68hc11-gas (LIB1ASMFUNCS): Build __far_trampoline.

t-m68hc11-gas (LIB1ASMFUNCS): Build __far_trampoline.

	* config/m68hc11/t-m68hc11-gas (LIB1ASMFUNCS): Build __far_trampoline.
	(MULTILIB_OPTIONS): Must also generate for -mlong-calls.

	* config/m68hc11/larith.asm: Put a mode for ELF ABI flags.
	(ret, declare, farsym): New gas macros.
	(__premain, exit, abort, _cleanup, memcpy, memset, ___adddi3,
	___subdi3, ___notdi2, __mulhi32, __mulsi3): Use them to use 'rtc'
	and declare the symbol far when compiled with -mlong-calls.
	(__far_trampoline): New for 68HC12 trampoline code to invoke a
	far handler using jsr/bsr.

	* config/m68hc11/m68hc11-crt0.S: Put a mode for ELF ABI flags.
	(jsr): New macro to transform a 'jsr' into a 'call'.

From-SVN: r56282