* elfread.c (elf_symtab_read): Update.

	* elfread.c (elf_symtab_read): Update.
	* objfiles.c (objfiles_bfd_data): New global.
	(get_objfile_bfd_data, free_objfile_per_bfd_storage)
	(objfile_bfd_data_free, set_objfile_per_bfd): New functions.
	(allocate_objfile, free_objfile): Update.
	(_initialize_objfiles): Initialize objfiles_bfd_data.
	* objfiles.h (struct objfile_per_bfd_storage): New.
	(struct objfile) <per_bfd>: New field.
	<filename_cache>: Remove.
	(set_objfile_per_bfd): Declare.
	* symfile.c (reread_symbols): Update.  Call
	set_objfile_per_bfd.
	(allocate_symtab): Update.
	* symmisc.c (print_symbol_bcache_statistics): Update.
	(print_objfile_statistics): Print the size of the BFD obstack.
gdb/testsuite
	* gdb.base/maint.exp: Update.