* we're using QT_DIR_NAME subdirectory mostly to prevent conflicts with existing files from qt4
but setting it in all OE_QMAKE_PATH_* variables causes all apps which are just using qmake to
build to install e.g. in /qt5 which for stuff like qterminal or something doesn't
sound right (as long as there isn't qterminal4 and qterminal5 recipe)
* some variables are kept with default QT_DIR_NAME, e.g. qml, imports, plugins we can assume that
every application which installs some QML files will install them in location shared by all
* add qt5-native.inc which also adds this QT_DIR_NAME and common
inherits (later will be used also by qtwayland-native.inc)
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>