PR ld/6766

 	PR ld/6766
	* lexsup.c (parse_args <-e>): Revert 2009-03-18 change.
	* ldemul.c (after_parse_default): Add entry symbol as undef.
	* emultempl/alphaelf.em (alpha_after_parse): Call after_parse_default.
	* emultempl/cr16elf.em (cr16elf_after_parse): Likewise.
	* emultempl/crxelf.em (crxelf_after_parse): Likewise.
	* emultempl/hppaelf.em (hppaelf_after_parse): Likewise.
	* emultempl/ia64elf.em (gld${EMULATION_NAME}_after_parse): Likewise.
	* emultempl/pe.em (gld_${EMULATION_NAME}_after_parse): Call
	after_parse_default and delete now duplicate code.
	* emultempl/pep.em (gld_${EMULATION_NAME}_after_parse): Likewise.
	* scripttempl/elf32cr16.sc: No need to make entry extern.
	* scripttempl/elf32cr16c.sc: Likewise.
	* scripttempl/elf32crx.sc: Likewise.
	* scripttempl/elf32xc16xs.sc: Only provide ENTRY on final link.