Add Linux style directory searching.

	Add Linux style directory searching.
	* configure.tgt: Add i386lelf to targ_extra_emuls for
	i[345]86-*-linuxaout* and i[345]86-*-linuxoldld.  For
	i[345]86-*-linux*, set targ_emul to i386lelf, and add elf_i386 to
	targ_extra_emuls.
	* emulparams/i386lelf.sh: New file, a copy of elf_i386.sh.
	* emultempl/elf32.em: If TARGET_IS_i386lelf, use autoconf
	recommended mechanism to define DIR and struct dirent.
	(libcmp): New static function use only when TARGET_IS_i386lelf.
	(gld${EMULATION_NAME}_open_dynamic_archive): Likewise.
	* Makefile.in (ALL_EMULATIONS): Add ei386lelf.o
	(ei386lelf.c): New target.