HACKING: Add comment on what `sudo su geoclue` does

4 jobs for master in 4 minutes and 39 seconds (queued for 48 seconds)
Status Job ID Name Coverage
  Test
passed #176577
ubuntu-16.04

00:01:29

passed #176578
ubuntu-17.10

00:01:47

passed #176579
ubuntu-18.04

00:01:58

passed #176580
ubuntu-18.04-no-backend

00:01:17