Fix eclipse gdx-backends-jogl and gdx-joal runnable jar export
Include JogAmp linux-arm natives for gluegen-rt, joal and jogl
Remove extra copy of gluegen-rt jars after eclipse export
    Introduce gdx-jogamp to hold a single copy of jogamp gluegen-rt jars
    Update gdx-backend-jogl and gdx-joal .classpath to depend on gdx-jogamp
Update build.xml to match above changes.

Signed-off-by: Xerxes Rånby <xerxes@zafena.se>