[Maintenance] - ci.linaro.org down time 15/05/2021

[Riku Voipio]

Hello All,

The server will stop processing jobs on the 14/05/2021 at around
23:00 UTC, as the server will be put into "Shutdown mode".

We will be going to upgrade the host machine to latest ubuntu LTS,
upgrade jenkins and plugins and make it possible to use LDC cloud
builders

Start: 15/05/2021 08:00 UTC
End: 15/05/2021 10:00 UTC

Regards
Riku