arm kickstarts: extend filesystems to unblock image builds
    
    All of these images are failing because more disk space is needed
    to install the required rpms. This PR bumps the sizes so that they
    should succeed. See [1].
    
    Here are the current failures in rawhide:
    
    koji task: 25182851 Workstation armhfp live image
    DEBUG util.py:439:     At least 93MB more space needed on the / filesystem.
    
    koji task: 25182858 Spins armhfp LXDE
    DEBUG util.py:439:     At least 926MB more space needed on the / filesystem.
    
    koji task: 25182869 Spins armhfp Mate
    DEBUG util.py:439:     At least 121MB more space needed on the / filesystem.
    
    koji task: 25182901 Spins armhfp LXQt
    DEBUG util.py:439:     At least 180MB more space needed on the / filesystem.
    
    koji task: 25182854 Spins armhfp KDE
    DEBUG util.py:439:     At least 294MB more space needed on the / filesystem.
    
    [1] https://pagure.io/dusty/failed-composes/issue/9#comment-495037
    
    Signed-off-by: Dusty Mabe <dusty@dustymabe.com>