Upgrade to com.twitter.common#jar-tool;0.1.6

This picks up a fix for moving the temporary jar file created
to it final target location when the two reside on different
filesystems.

Testing Done:
$ PANTS_DEV=1 ./pants goal binary bundle src/java/com/pants/::

Bugs closed: 193

Reviewed at https://rbcommons.com/s/twitter/r/465/