SDL_mixer: update libxmp. (755e6)

From 755e6f3d15643eb36b31793f10b006d67e377a8b Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Fri, 25 Aug 2023 17:01:10 +0300
Subject: [PATCH] update libxmp.

---
 external/libxmp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/external/libxmp b/external/libxmp
index 30d6b428..7110b3bc 160000
--- a/external/libxmp
+++ b/external/libxmp
@@ -1 +1 @@
-Subproject commit 30d6b4284446b2dd6fc042cec9388321313ebb22
+Subproject commit 7110b3bc5fd645551c3778f13bf45e4b90445aba