Add firefox-esr-mobile-config

jobs.yml

@@ -75,6 +75,10 @@ evscript:
   archs: ['aarch64', 'armhf', 'amd64']
   dists: ['buster+ci']
   branch: master
+firefox-esr-mobile-config:
+  url: https://source.puri.sm/Librem5/debs/firefox-esr-mobile-config.git
+  dists: ['buster']
+  branch: 'pureos/amber-phone'
 flash-kernel:
   url: https://source.puri.sm/Librem5/flash-kernel.git
   archs: ['aarch64']