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/qtwaylandscanner/qtwaylandscanner-5.15.17.ebuild

@@ -0,0 +1,22 @@
+# Copyright 1999-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+QT5_MODULE="qtwayland"
+inherit qt5-build
+
+DESCRIPTION="Tool that generates certain boilerplate C++ code from Wayland protocol xml spec"
+
+if [[ ${QT5_BUILD_TYPE} == release ]]; then
+	KEYWORDS="~amd64 ~arm ~arm64 ~hppa ~loong ~ppc ~ppc64 ~riscv ~x86"
+fi
+
+DEPEND="=dev-qt/qtcore-${QT5_PV}*:5="
+RDEPEND="${DEPEND}
+	!<dev-qt/qtwayland-5.15.3:5
+"
+
+QT5_TARGET_SUBDIRS=(
+	src/qtwaylandscanner
+)