gdb
	* symfile.c (get_debug_link_info): Remove.
	(find_separate_debug_file_by_debuglink): Use
	bfd_get_debug_link_info.
bfd
	* opncls.c (bfd_get_debug_link_info): Rename from
	get_debug_link_info.  Export.  Update comment.
	(find_separate_debug_file): Update.
	* bfd-in2.h: Rebuild.
	* gdb_bfd.c (struct gdb_bfd_data) <crc_computed, crc>:
	New fields.
	(get_file_crc): Move from symfile.c.
	(gdb_bfd_crc): New function.
	* gdb_bfd.h (gdb_bfd_crc): Declare.
	* objfiles.h (struct objfile) <crc32, crc32_p>: Remove.
	* symfile.c (get_file_crc): Move to gdb_bfd.c.
	(separate_debug_file_exists): Use gdb_bfd_crc.