Add make target for testing AppImage against distros
Add make target for testing AppImage against distros

There are two new targets:

    make test-bundle # for all supported distros
    make-test-bundle-unsupported # for all unsupported distros

tomashaber/raiden,tomashaber/raiden,charles-cooper/raiden,charles-cooper/raiden,tomashaber/raiden,hackaugusto/raiden,tomashaber/raiden,tomashaber/raiden,hackaugusto/raiden