This is the final patch that does actual addition of build-id attribute 
to qxfer_libraries.

	* doc/gdb.texinfo (Library List Format for SVR4 Targets): Add
	'build-id' in description, example, new attribute in dtd.
	* linux-low.c (linux-maps.h, search.h): Include.
	(struct build_id_list): New structure.
	(build_id_list_s): New typedef, new vector type def.
	(free_build_id_list, compare_build_id_list,
	 compare_build_id_list_range, compare_build_id_list_inode): New.
	(struct find_memory_region_callback_data): New.
	(find_memory_region_callback): New fwd. declaration.
	(read_build_id, find_memory_region_callback, get_hex_build_id): New.
	(linux_qxfer_libraries_svr4): Add optional build-id attribute
	to reply XML document.


Thanks,

Aleksandar