* dwarf2read.c (macro_start_file): Update.

	* dwarf2read.c (macro_start_file): Update.
	* objfiles.c (get_objfile_bfd_data): Initialize macro_cache.
	(free_objfile_per_bfd_storage): Destroy macro_cache.
	(allocate_objfile, free_objfile): Update.
	* objfiles.h (struct objfile_per_bfd_storage) <macro_cache>:
	New field.
	(struct objfile) <macro_cache>: Remove.
	* symfile.c (reread_symbols): Update.
	* symmisc.c (print_symbol_bcache_statistics): Update.
	(print_objfile_statistics): Update.