redhat-rpm-config: change default arch level target for all ARM v7 to armv7hl
    
    All ARM version 7 systems support a vector hardware floating point unit and
    have the ability to run using the hard floating point ABI (aapcs-vfpv3-d16).
    This is the only configuration we support as a v7 target, so we force the
    use of hard floating point. This prevents e.g. packages being built with
    a armv5tel target on an armv7 system without explicit intent.
    
    Signed-off-by: Jon Masters <jcm@jonmasters.org>