Update to 1.1.90 and libhandy 1 ABI, based on earlier libhandy1 packaging
    
    This effectively retires old libhandy 0.0 ABI and moves libhandy 1 ABI
    from libhandy1 package to libhandy package as we no longer have any
    packages left using the old libhandy 0.0 ABI.
    
    I've reused libhandy1 packaging here exactly as it was, and only updated
    the package name to libhandy + added obsoletes and provides to keep the
    upgrade path.
    
    With this, we can retire the separate libhandy1 package.