Tell update_global_location_list to insert breakpoints

Tell update_global_location_list to insert breakpoints

This adds a new mode for update_global_location_list, that allows
callers saying "please insert breakpoints, even if
breakpoints_always_inserted_mode() is false".  This allows removing a
couple breakpoints_always_inserted_mode checks.

gdb/
2014-09-22  Pedro Alves  <palves@redhat.com>

	* breakpoint.c (enum ugll_insert_mode): Add UGLL_INSERT.
	(insert_breakpoints): Don't call insert_breakpoint_locations here.
	Instead, pass UGLL_INSERT to update_global_location_list.
	(update_global_location_list): Change parameter type from boolean
	to enum ugll_insert_mode.  All callers adjusted.  Adjust to use
	breakpoints_should_be_inserted_now and handle UGLL_INSERT.
	(create_solib_event_breakpoint_1): New, factored out from ...
	(create_solib_event_breakpoint): ... this.
	(create_and_insert_solib_event_breakpoint): Use
	create_solib_event_breakpoint_1 instead of calling
	insert_breakpoint_locations manually.
	(update_global_location_list): Handle UGLL_INSERT.