gdb/

gdb/
	Drop lazy lm_info reading.
	* solib-svr4.c (struct lm_info): Remove field lm.  New fields l_addr_p,
	l_addr_inferior, l_ld, l_next, l_prev and l_name.
	(lm_info_read): New function.
	(lm_addr_from_link_map, lm_dynamic_from_link_map): Remove.
	(lm_addr_check): Use l_addr_p.  No longer use lm_addr_from_link_map and
	lm_dynamic_from_link_map.
	(lm_next, lm_prev, lm_name): Remove.
	(svr4_keep_data_in_core): Use lm_info_read, drop the lm_info entries
	initialization incl. read_memory.  No longer use lm_name.
	(svr4_free_so): Drop lm_info->lm freeing.
	(svr4_default_sos): Initialize lminfo with zeroes.  Use l_addr_p.  Drop
	explicit lm_addr and lm initialization.
	(svr4_read_so_list): Use lm_info_read, drop the initailization of
	fields by hand, incl. read_memory.  No longer use lm_next, lm_prev and
	lm_name.