Uses an event to terminate the parser threads instead of a queue. This
is not only simpler, but saves about 500ms on shutdown time
(Bitbake rev: 2aed34e1d4bf24bba6263f168ff31b55b5fbe982)
Signed-off-by: Joshua Watt <JPEWhacker@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>