ecoff bfd.h tidy
    
    bfd/
    	* bfd-in.h: Move ecoff function declarations..
    	* ecoff-bfd.h: ..to here, new file.
    	* ecoff.c: Include ecoff-bfd.h.
    	* ecofflink.c: Likewise.
    	* elf64-alpha.c: Likewise.
    	* elfxx-mips.c: Likewise.
    	* bfd-in2.h: Regenerate.
    gas/
    	* config/obj-ecoff.c: Include ecoff-bfd.h.
    	* config/obj-elf.c: Likewise.