libsdl2-mixer: Fix build with autoconf 2.70+

Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-graphics/libsdl/libsdl2-mixer/0001-configure.in-Undefine-AC_CONFIG_AUX_DIR.patch

@@ -0,0 +1,34 @@
+From 9363c98528ef850235852e44f678df6b5c011ee1 Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Sun, 7 Feb 2021 18:08:36 -0800
+Subject: [PATCH] configure.in: Undefine AC_CONFIG_AUX_DIR
+
+This helps reconfiguring with autotools 2.70+
+
+Upstream-Status: Pending
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+ configure.in | 5 -----
+ 1 file changed, 5 deletions(-)
+
+--- a/configure.in
++++ b/configure.in
+@@ -1,7 +1,6 @@
+ dnl Process this file with autoconf to produce a configure script.
+ AC_INIT(README.txt)
+ AC_CONFIG_AUX_DIR(build-scripts)
+-
+ dnl Set various version strings - taken gratefully from the GTk sources
+ 
+ # Making releases:
+@@ -40,10 +39,6 @@ AC_SUBST(LT_CURRENT)
+ AC_SUBST(LT_REVISION)
+ AC_SUBST(LT_AGE)
+ 
+-dnl Detect the canonical build and host environments
+-AC_CONFIG_AUX_DIRS($srcdir/build-scripts)
+-dnl AC_CANONICAL_HOST
+-
+ dnl Check for tools
+ AC_PROG_LIBTOOL
+ AC_PROG_CC

meta-oe/recipes-graphics/libsdl/libsdl2-mixer_2.0.4.bb

@@ -4,18 +4,18 @@ DEPENDS = "virtual/libsdl2 flac libmikmod libvorbis"
 LICENSE = "Zlib"
 LIC_FILES_CHKSUM = "file://COPYING.txt;md5=516daf7a177ad4c8874bb9efa1a69c1f"
 
-SRC_URI = "http://www.libsdl.org/projects/SDL_mixer/release/SDL2_mixer-${PV}.tar.gz"
-
-SRC_URI[md5sum] = "a36e8410cac46b00a4d01752b32c3eb1"
+SRC_URI = "http://www.libsdl.org/projects/SDL_mixer/release/SDL2_mixer-${PV}.tar.gz \
+           file://0001-configure.in-Undefine-AC_CONFIG_AUX_DIR.patch \
+          "
 SRC_URI[sha256sum] = "b4cf5a382c061cd75081cf246c2aa2f9df8db04bdda8dcdc6b6cca55bede2419"
 
 S = "${WORKDIR}/SDL2_mixer-${PV}"
 
 inherit autotools-brokensep pkgconfig
 
-EXTRA_AUTORECONF += "--include=acinclude"
 EXTRA_OECONF = "--disable-music-mp3 --enable-music-ogg --disable-music-ogg-shared LIBS=-L${STAGING_LIBDIR}"
 
+PACKAGECONFIG ??= ""
 PACKAGECONFIG[mad] = "--enable-music-mp3-mad-gpl,--disable-music-mp3-mad-gpl,libmad"
 
 do_configure_prepend () {