Update buildupdate for new dependencies

Change libpalaso and chorus to use master (since it has merges from
FlexBridgeBeta).
Specify the root_dir correctly

There was a bug in the BuildUpdate script that would not put root_dir
in the header lines.  So re-running the buildupdate script would loose
the root directory setting.  Regenerate this file with the corrected
BuildUpdate script.
Correct dependencies in TeamCity

Windows build was missing the Palaso.Media and Palaso.DictionaryServices
assemblies.