Update bitcoin-util-test data for HUC.
Update bitcoin-util-test data for HUC.

Update the bitcoin-util-test.json data for huntercoin-tx, using the
correct magic bytes for addresses and private keys.

wiggi/huntercore,wiggi/huntercore,wiggi/huntercore,wiggi/huntercore,domob1812/huntercore,domob1812/huntercore,wiggi/huntercore,domob1812/huntercore,wiggi/huntercore,domob1812/huntercore,domob1812/huntercore,domob1812/huntercore