Set the mode on ipaupgrade.log during RPM %post snipppet
    
    The IPA tools will create /var/log/ipaupgrade.log with mode
    0600. If for some reason this file doesn't exist during
    upgrade then it will be created by the RPM transaction with
    mode 0644 (because of umask).
    
    So always set the mode once the snippets are done. This
    will ensure that a newly created log will have the expected
    mode and also fix any previous incorrectly set mode.
    
    Fixes: https://pagure.io/freeipa/issue/8899
    
    Signed-off-by: Rob Crittenden <rcritten@redhat.com>
    Reviewed-By: Stanislav Levin <slev@altlinux.org>