Hmm. Your run.sh file should just look like this:
cd work && ./arduino && cd ..
and your work/arduino file should be:
# put the directory where this file lives in the front of the path, because
# that directory also contains jikes, which we will need at runtime.
# put the directory with the native RXTX libs in the library path
I'm not sure where the == would be coming from. Any idea?