Android-build slaves are upgraded to Ubuntu 14.04 LTS

Hello,

Sorry this should have gone early next week, but was delayed due to issues discovered, and then backlogged due to other tasks.

Anyway, android-build.linaro.org build slaves were upgraded to Ubuntu 14.04 (from 12.04) on Friday Nov 14th, followed Vishal's approval.

The were some issues with restricted builds, which were resolved during last week. Public build didn't experienced any problems. If you see any issues though (like missing packages), let us (Systems) know, preferrably via bugtracker: https://bugs.linaro.org/enter_bug.cgi?product=Linaro%20CI