qt4: package QML plugins and correct their install directory
QML components from Qt were installed to ${prefix} before and never got
packaged. This is now fixed and QML components are now installed into
${libdir}/${QT_DIR_NAME}/imports and packaged into qt4-*-qml-plugins
package.
Additionally qmlviewer and the examples/demos are now dependent upon
these plugins as needed.
Originally based on OE commit
4adf97be8c5b5f71ad92095a19968af534baa9e2
by Simon Busch <morphis@gravedo.de>
Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>