minimaven: support "bundle" packaging

A "bundle" is just an OSGi-ified JAR file, so we should treat
them the same as regular "jar" bundling for our purposes.
Merge branch 'bundle-packaging'

This lets MiniMaven handle JARs which are OSGi bundles.

Specifically, it avoids an issue with log4j dependencies being ignored
(and hence not added to downstream JARs' MANIFEST.MF classpaths) due to
the packaging being "bundle" rather than "jar" as usual.