lipstick: removes a warning about QInotify searching for the missing /usr/share/icons/hicolor/86x86/apps/ directory

Set QT_DIR_NAME to an empty string so that Qt specific binaries are no longer installed in odd not-in-PATH places like /usr/bin/qt5/. It also removes the need for some ugly sed hacks. Cf: https://github.com/meta-qt5/meta-qt5/blob/master/classes/qmake5_paths.bbclass

Fixes incorrect dependencies to qtquick1 which built huge packages like qtwayland for no good reason...

This reverts commit a407fec7.

lipstick: adds a build dependency to qttools-native which isn't built by default on newer toolchain (migration to jethro)

lipstick: adds qt5-qpa-hwcomposer-plugin as RDEPENDS else it is not deteced as need and won't be installed