Update libjitsi to 4d7f9a0e49 to include an SDES "on hold" patch
Fix security on notification for call conferences
Skips building dmg deltas against the same build number.
Fixes initial arguments handling, may fail as UIService is not started yet.
Adds searching for available jvms installed on client machine respecting JVMVersion set and fallback to original launcher if nothing found.
Activates jre embedding.
Merge from Jitsi trunk - Release 4892

Merge branch 'master' of git://github.com/jitsi/jitsi

Conflicts:
	resources/install/installers.properties
Version Bump 1.2.1 -> 1.2.2
Fix my broken conflict resolution causing an error.