Upgrades the Ant compiler source and target from 1.5 to 1.6 because Ant ignores 1.5 as obsolete and our sources require 1.6 anyway.
Upgrades the Ant compiler source and target from 1.5 to 1.6 because Ant ignores 1.5 as obsolete and our sources require 1.6 anyway.

mondain/ice4j,jitsi/ice4j,ubivent-seuffert/ice4j,jitsi/ice4j