Make _bfd_error_handler available outside libbfd

Make _bfd_error_handler available outside libbfd

Needed when building libopcodes.so.

bfd/
	* bfd.c (_bfd_error_handler): Arrange for this function to be
	declared in bfd-in2.h.
	* libbfd-in.h (_bfd_error_handler): Don't declare.
	* libbfd.h: Regenerate.
	* bfd-in2.h: Regenerate.
opcodes/
	* sysdep.h (_bfd_error_handler): Don't declare.
	* msp430-decode.opc: Include bfd.h.  Don't include ansidecl.h here.
	* rl78-decode.opc: Likewise.
	* msp430-decode.c: Regenerate.
	* rl78-decode.c: Regenerate.