grab-logs.sh
    
    Download the build logs for a list of architectures. Only
    downloads the logs if they are present in the server. Logs
    are saved in logs directory within the source tree.
    
    By default looks at build logs for i686, x86_64, noarch and
    armv7hl.
    
    Signed-off-by: Miguel Flores Silverio <floresmigu3l@gmail.com>