bundle qt platform plugins

this gives the user more leeway to use the appimage
closes: #554

Author: lievenhey

scripts/appimage/build_appimage.sh

@@ -61,6 +61,9 @@ cp -v "/usr/share/icons/breeze/breeze-icons.rcc" "appdir/usr/share/icons/breeze/
 # TODO: further down also add:
 # -e "./appdir/usr/plugins/kgraphviewerpart.so" \
 
+# add extra platform plugins
+export EXTRA_PLATFORM_PLUGINS="libqoffscreen.so;libqwayland-generic.so;libwqayland-egl.so"
+
 linuxdeploy-x86_64.AppImage --appdir appdir --plugin qt \
     -e "./appdir/usr/lib64/libexec/hotspot-perfparser" \
     -e "./appdir/usr/bin/hotspot" \