* emultempl/generic.em: Support EXTRA_EM_FILE.

	* emultempl/generic.em: Support EXTRA_EM_FILE.
	(ld_${EMULATION_NAME}_emulation): Support emulation parameters
	LDEMUL_BEFORE_PARSE, LDEMUL_SYSLIB, LDEMUL_HLL,
	LDEMUL_AFTER_PARSE, LDEMUL_AFTER_OPEN, LDEMUL_AFTER_ALLOCATION,
	LDEMUL_SET_OUTPUT_ARCH, LDEMUL_CHOOSE_TARGET,
	LDEMUL_BEFORE_ALLOCATION, LDEMUL_GET_SCRIPT, LDEMUL_FINISH,
	LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS,
	LDEMUL_OPEN_DYNAMIC_ARCHIVE, LDEMUL_PLACE_ORPHAN,
	LDEMUL_SET_SYMBOLS, LDEMUL_PARSE_ARGS, LDEMUL_UNRECOGNIZED_FILE,
	LDEMUL_LIST_OPTIONS, LDEMUL_RECOGNIZED_FILE,
	LDEMUL_FIND_POTENTIAL_LIBRARIES.