2011-12-15 Shinichiro Hamaji <shinichiro.hamaji@gmail.com>

2011-12-15  Shinichiro Hamaji  <shinichiro.hamaji@gmail.com>

	* mach-o.c (bfd_mach_o_canonicalize_reloc): Update relocation
	table only when there isn't the cahce.
	(bfd_mach_o_get_dynamic_reloc_upper_bound): Need one more space
	for a pointer for the watchdog.
	(bfd_mach_o_canonicalize_dynamic_reloc): Utilize cache like
	bfd_mach_o_canonicalize_reloc.
	(bfd_mach_o_close_and_cleanup): Call bfd_mach_o_free_cached_info.
	(bfd_mach_o_free_cached_info): Free up cache data.
	* mach-o.h (reloc_cache): A place to store cache of dynamic relocs.
	(bfd_mach_o_free_cached_info): Add declaration.