CI: Capture build artifacts

Signed-off-by: Paul Barker <paul@betafive.co.uk>
4 jobs for pbarker/ci in 10 minutes and 4 seconds
Status Job ID Name Coverage
  Test
passed #174843095
beaglebone-yocto

00:08:30

passed #174843092
qemux86

00:07:55

passed #174843093
raspberrypi3

00:09:56

passed #174843094
raspberrypi3-64

00:10:03