Clean up the relaxing code for the new linker.

	Clean up the relaxing code for the new linker.
	* targets.c (_bfd_relax_section): Take boolean *again argument
	rather than asymbol list.
	* bfd.c (bfd_relax_section): Change name of fourth argument from
	symbols to again.
	* reloc.c (bfd_generic_relax_section): Take boolean *again
	argument rather than asymbol list.  Always return true.
	* bout.c: Include genlink.h.
	(aligncode, perform_slip): Declare.
	(perform_slip): Take BFD argument rather than asymbol list.
	Changed all callers.  Get the symbols from the BFD.  Change the
	hash table entry value as well as the symbol value.
	(abs32code): Take BFD argument rather than asymbol list.  Changed
	all callers.
	(aligncode): Likewise.
	(b_out_relax_section): Take boolean *again argument rather than
	asymbol list.  Only return false if an error occurred.  Set *again
	to false.  Get symbols from BFD.
	* reloc16.c: Include genlink.h.
	(bfd_perform_slip): Take BFD argument rather than asymbol list.
	Get the symbols from the BFD.  Change the hash table entry value
	as well as the symbol value.
	(bfd_coff_reloc16_relax_section): Take boolean *again argument
	rather than asymbol list.  Only return false if an error occurred.
	Set *again to false.  Get symbols from BFD.
	* coffcode.h (bfd_coff_backend_data): Change
	_bfd_coff_reloc16_estimate to take BFD argument rather than
	asymbol list.
	(bfd_coff_reloc16_estimate): Corresponding change.
	(dummy_reloc16_estimate): Corresponding change.
	* libcoff-in.h (bfd_coff_reloc16_relax_section): Change
	declaration to take boolean * rather than asymbol list.
	(bfd_perform_slip): Change declaration to take BFD rather than
	asymbol list.
	* coff-h8300.c (h300_reloc16_estimate): Take BFD argument rather
	than asymbol list.  Changed calls to bfd_perform_slip.
	* bfd-in2.h: Rebuilt.
	* libbfd.h: Rebuilt.
	* libcoff.h: Rebuilt.
	* Makefile.in: Rebuilt dependencies.