Check bfd support for bfd_mips_elf_get_abiflags in mips make rule
    
    The previous scheme with a dependency in opcodes on libbfd.la
    broke "make distclean".
    
    	* configure.ac: Revert 2016-12-23.
    	* Makefile.am: Likewise.
    	(MIPS_DEFS): Define.
    	(mips-dis.lo): Add rule.
    	* Makefile.in: Regenerate.
    	* aclocal.m4: Regenerate.
    	* config.in: Regenerate.
    	* configure: Regenerate.