[tests] add a QML only RPM with noarch

Signed-off-by: Reto Zingg <reto.zingg@jolla.com>
[script] test for arch, warn if qml only

Signed-off-by: Reto Zingg <reto.zingg@jolla.com>
Merge pull request #45 from sailfish-sdk/warn_arm_on_qml_rpm

Warn if arm and qml only rpm