* ieee-float.c: Moved to ../libiberty.

	* ieee-float.c: Moved to ../libiberty.
	* ieee-float.h: Moved to ../include.
	* Makefile.in:  Update accordingly.
	* i386-pinsn.c (print_insn), m68k-pinsn.c (print_insn):
	Convert to stubs that call disassemblers in ../opcodes/*-dis.c.
	* m68k-tdep.c:  Removed definition of ext_format ext_format_68881;
	it is now in ../opcodes/m68881-ext.c.
	* mips-tdep.c (mips_skip_prologue):  Try to skip more of the
	prologue (some callers _do_ care).
	* mips-pinsn.c (print_insn), z8k-tdep.c (print_insn):  Convert to
	new interface of ../opcodes/*-dis.c.
	* ch-exp.y:  Add #include <ctype.h>.