Fix minimal-json JAR not being included.
Still use jar target for a fat build.
New dependencies must be added to fatJar also, and updates should do that too.
Makes the library actually "usable" although it doesn't have enough features for a real use yet.
Test Plan: See if a runtime error occurs about minimal-json
Reviewers: CLOVIS, WyldBot
Reviewed By: CLOVIS, WyldBot
Subscribers: Hackintosh5, WyldBot, CLOVIS
Differential Revision: https://phabricator.wildfyre.net/D225