We have timestamps in the server logs but we don't know which
UI messages correlate to them. Add some timestamps to the messages
which doesn't make them pretty but which might make it possible to
debug problems.
(Bitbake rev: a1a86f8c311cb1fc4f5562f1c77f82aa95141eee)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>