SDL_mixer: autogen.sh: Delete temporary files after running autoconf

From 2538f76cd3ea9049ac0642e6226c1b2959320754 Mon Sep 17 00:00:00 2001
From: Simon McVittie <[EMAIL REDACTED]>
Date: Thu, 5 May 2022 17:57:47 +0100
Subject: [PATCH] autogen.sh: Delete temporary files after running autoconf

Signed-off-by: Simon McVittie <smcv@collabora.com>
---
 autogen.sh | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/autogen.sh b/autogen.sh
index 66e4e8e6..b9c972a8 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -7,6 +7,8 @@ echo "This may take a while ..."
 
 cat acinclude/* >aclocal.m4
 "${AUTOCONF:-autoconf}"
+rm aclocal.m4
+rm -rf autom4te.cache
 
 # Run configure for this platform
 echo "Now you are ready to run ./configure"