Avoid using logging in signal handlers
    
    Fixes bug 1029727
    
    It is possible for logging to cause problems during signal handlers.
    Fortunately, the logging we have in signal handlers is minimal and does
    not add enough value to try to keep through workarounds.
    
    Change-Id: I80708874c9740c906e5a49e0d9c1b45174470a85