Its often useful to know how long a task has been running for. This patch
adds that information to the task display, updating every 5s if there
were no other updates so the user can see how long tasks have been running
for.
[YOCTO #9737]
(Bitbake rev: 6c42025e5dd7761213be3f82f3252a7892d2239d)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>