RFA: enable gappletviewer, gjarsigner and gkeytool tools

[Tom Tromey]

>>>>> "Tom" == Thomas Fitzsimmons <fitzsim@redhat.com> writes:

Tom> To support the -J option to the tools, we'd still need a wrapper,
Tom> it'd just be a CNI wrapper rather than a JNI wrapper.

If -J is useful we arguably ought to support it in CNI wrappers.
This could be done by adding a command line option to gcj which is
passed down to jvgenmain and from there to the startup sequence.

File a PR if you think this is worthwhile... I'm not so sure myself.
I think I use GCJ_PROPERTIES in those rare instances where I want this.

Tom