Get rid off javax.xml. Fix building launcher on arm. Fix RHBZ #878210.
    
    The launcher was not built properly because Equinox Launcher build
    script had no support for arm architectures, therefore it did not knew
    where to copy the binary.
    
    javax.xml is provided by the VM so there is no need to bundle it. Due to
    inconsistencies in packaging, some errors appear (see RHBZ #710815).
    This is removal in a first place (eclipse-dtp and eclipse-mylyn updates
    will follow).
    
    Additionally, the binary class was not copied properly into the
    compatibility bundle. We can't build it properly (because it was some
    old, unknown version), but we can build current version and hope for the
    best.