Releases/Firefox 38.0.5b4/BuildNotes

• Android L10N repacks failed because they were pulling mozilla-beta instead of mozilla-release

Fixed by

https://hg.mozilla.org/build/mozharness/rev/1fcd3860a5c4
https://hg.mozilla.org/build/mozharness/rev/24fa981dea42
https://hg.mozilla.org/build/mozharness/rev/addaff279f68

backed out in

https://hg.mozilla.org/build/mozharness/rev/cc388e443130
https://hg.mozilla.org/build/mozharness/rev/60fdd4a5b0cd