elf bfd.h tidy
    
    bfd/
    	* bfd-in.h (enum notice_asneeded_action): Move to bfdlink.h.
    	Move most other elf declarations..
    	* elf-bfd.h: ..to here.
    	* bfd-in2.h: Regenerate.
    include/
    	* bfdlink.h (enum notice_asneeded_action): Define.
    ld/
    	* deffilep.y: Include bfdlink.h.
    	* ldelf.c: Likewise.
    	* ldelfgen.c: Likewise.
    	* ldver.c: Likewise.
    	* mri.c: Likewise.
    	* emultempl/irix.em: Don't include ld.h, ldmain.h, libiberty.h.
    	Comment.