Support "make image=rogue"

Unfortunately, in addition to the changes in osv-apps.git needed for the
"rogue" image, I also need to make a couple of changes in this repository.

Signed-off-by: Nadav Har'El <nyh@cloudius-systems.com>
Signed-off-by: Pekka Enberg <penberg@cloudius-systems.com>
Support "make image=specjvm"

Add file needed for "make image=specjvm" using osv-apps.git.
It builds an image containing both the management tools and specjvm.
The default command line is the management - you can run specjvm
explicitly, e.g.,
 run.py -m3G -c2 -e "java.so -jar specjvm.jar -ikv -bt 2 -it 10 -wt 10 derby"

Signed-off-by: Nadav Har'El <nyh@cloudius-systems.com>
Signed-off-by: Pekka Enberg <penberg@cloudius-systems.com>