SDL_image: update vendored aom to new clean v3.6.x-SDL branch.

From e632a7e3de799cb7697d60384cab2aeafd4568c0 Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Sat, 23 May 2026 14:47:50 +0300
Subject: [PATCH] update vendored aom to new clean v3.6.x-SDL branch.

(cherry picked from commit 75fb9ee58cfc3a63aa09e4731be07bf8f47da223)
---
 .gitmodules  | 2 +-
 external/aom | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/.gitmodules b/.gitmodules
index 963b76f1..d82fca66 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -33,4 +33,4 @@
 [submodule "external/aom"]
 	path = external/aom
 	url = https://github.com/libsdl-org/aom.git
-	branch = v3.6.1-SDL
+	branch = v3.6.x-SDL
diff --git a/external/aom b/external/aom
index 6c10f411..2d51f32c 160000
--- a/external/aom
+++ b/external/aom
@@ -1 +1 @@
-Subproject commit 6c10f41103364903f991ecf94239933cad725ab8
+Subproject commit 2d51f32cb8a588e21f20e96fcb2004fca72501ba