Add dev-qt from an older version of the gentoo repo

Qt5 has been removed, we restore it since we still use it.

dev-qt/qtwayland/files/qtwayland-6.8.2-QTBUG-127821.patch

@@ -0,0 +1,19 @@
+https://bugreports.qt.io/browse/QTBUG-127821
+https://codereview.qt-project.org/c/qt/qtwayland/+/623667
+--- a/src/client/qwaylandinputdevice.cpp
++++ b/src/client/qwaylandinputdevice.cpp
+@@ -1140,8 +1140,10 @@
+             // If the window has been destroyed, we still need to report an up event, but it can't
+             // be handled by the destroyed window (obviously), so send the event here instead.
+-            QWindowSystemInterface::handleMouseEvent(nullptr, event->timestamp, event->local,
+-                                 event->global, event->buttons,
+-                                 event->button, event->type,
+-                                 event->modifiers);// , Qt::MouseEventSource source = Qt::MouseEventNotSynthesized);
++            QWindowSystemInterface::handleMouseEvent(
++                    nullptr, event->timestamp,
++                    QPointingDevice::primaryPointingDevice(mParent->seatname()), event->local,
++                    event->global, event->buttons, event->button, event->type,
++                    event->modifiers); // , Qt::MouseEventSource source =
++                                       // Qt::MouseEventNotSynthesized);
+         }
+         delete mFrameData.event;