Although most or all of them just need native tools we need to DEPEND on cross
qttools:
1. cross cmake files are found first
2. QTConfig.cmake (shipped by qtbase) loops for components in current directory
and therfore does not find Qt5UiToolsConfig.cmake in case qtools-native was
build only
Signed-off-by: Andreas Müller <schnitzeltony@googlemail.com>
