qt4: package qml plugins too and correct their install directory
QML components from Qt source were installed to ${prefix} before and got never packaged.
This is now fixed and QML components are now installed into
${libdir}/${QT_DIR_NAME}/imports and packaged into qt4-*-qml-plugins package.
NOTE: There are still some unpackaged entries left for qt4:
WARNING: /usr/lib/pkgconfig/QtUiTools.pc
WARNING: /usr/lib/qtopia/plugins/qmltooling/libtcpserver.so
WARNING: /usr/lib/qtopia/plugins/qmltooling/.debug/libtcpserver.so
WARNING: /usr/lib/fonts/fontdir
WARNING: /usr/lib/fonts/README
WARNING: /usr/lib/libQtUiTools.prl
Signed-off-by: Simon Busch <morphis@gravedo.de>