remote.c: Remove unnecessary fields from 'struct stop_reply'.

I noticed these fields aren't really necessary -- if the T stop reply
indicated any we have any special event, the fallthrough doesn't
really do anything.

Tested on x86_64 Fedora 17 w/ local gdbserver, and also confirmed
"catch load" against a Windows gdbserver running under Wine, which
exercises TARGET_WAITKIND_LOADED, still works as expected.

gdb/
2013-09-27  Pedro Alves  <palves@redhat.com>

	* remote.c (struct stop_reply) <solibs_changed, replay_event>:
	Delete fields.
	(remote_parse_stop_reply): Adjust, setting event->ws.kind
	directly.