* 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
The variables set by 'configure' for --with-system-(nss|nspr) is named
differently in UXP. This breaks packaging for palemoon when system
nss/nspr is used.
This commit corrects the name of said variables.
