Ship JustJ with flatpak nightly products

Also use new version of the process shim

Change-Id: I8b581e1d054d32de083d99731704a639d9aab4fd
Signed-off-by: Mat Booth <mat.booth@redhat.com>
Reviewed-on: https://git.eclipse.org/r/c/linuxtools/org.eclipse.linuxtools.eclipse-build/+/174721
6 files changed