mixxx: Fix build with scons 4.x

With 2.3 mixxx has moved to cmake but that is not released yet. So fix scons
build for now.

Signed-off-by: Andreas Müller <schnitzeltony@gmail.com>

recipes-musicians/mixxx/mixxx/0005-Fix-build-with-scons-4.x.patch

@@ -0,0 +1,31 @@
+From da5d37978ba2d5fe791a87333e0ff0165a4a4706 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Andreas=20M=C3=BCller?= <schnitzeltony@gmail.com>
+Date: Mon, 14 Jun 2021 08:39:07 +0200
+Subject: [PATCH] Fix build with scons 4.x
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Upstream-Status: Pending
+
+Signed-off-by: Andreas Müller <schnitzeltony@gmail.com>
+---
+ build/qt5.py | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/build/qt5.py b/build/qt5.py
+index 42c706a3ba..0c2ac31181 100644
+--- a/build/qt5.py
++++ b/build/qt5.py
+@@ -43,7 +43,7 @@ import SCons.Scanner
+ import SCons.Tool
+ import SCons.Util
+ 
+-class ToolQt5Warning(SCons.Warnings.Warning):
++class ToolQt5Warning(SCons.Warnings.SConsWarning):
+     pass
+ 
+ class GeneratedMocFileNotIncluded(ToolQt5Warning):
+-- 
+2.31.1
+

recipes-musicians/mixxx/mixxx_git.bb

@@ -45,6 +45,7 @@ SRC_URI = " \
     file://0002-force-using-system-soundtouch.patch \
     file://0003-align-path-of-qt-build-tools-to-our-needs.patch \
     file://0004-Do-not-add-host-libdir-to-LDPATH-rpath.patch \
+    file://0005-Fix-build-with-scons-4.x.patch \
 "
 SRCREV = "59683489997e19d861a218e2e692cdbe52168869"
 S = "${WORKDIR}/git"