* The langpack is not generated via the package target but IS for mozpackage target using old behavior
* Add mach command to specifically generate the langpack when needed without the rest of the packaging routine (mach langpack)
* This adds what will eventually be a rewritten packaging routine while maintaining backwards compatibility with the original mozilla routine
* Changes the build target and installer makefile to use the alternative packaging
* Adds build target to specifically invoke the original mozilla routine
* Update mach commands accordingly
