Fix libaom build with NASM 3

tools/chatgui/ffmpeg/build_ffmpeg.sh

@@ -7,7 +7,7 @@ SRC_DIR="$BUILD_DIR/src"
 INSTALL_DIR="$BUILD_DIR/install"
 JOBS=$(nproc 2>/dev/null || echo 4)
 AMF_HEADERS_VERSION="${AMF_HEADERS_VERSION:-1.5.3}"
-FFMPEG_PROFILE_MARKER="$INSTALL_DIR/share/utun-chatgui-ffmpeg-minimal-v1"
+FFMPEG_PROFILE_MARKER="$INSTALL_DIR/share/utun-chatgui-ffmpeg-minimal-v2"
 
 case "$(uname -s)" in
     Linux)                      PLATFORM=linux ;;
@@ -146,7 +146,13 @@ fi
 
 # --- libaom (reference AV1 encoder) ---
 if [ ! -f "$INSTALL_DIR/lib/pkgconfig/aom.pc" ]; then
-    do_clone libaom https://aomedia.googlesource.com/aom v3.12.0
+    LIBAOM_TAG=v3.13.2
+    do_clone libaom https://aomedia.googlesource.com/aom "$LIBAOM_TAG"
+    if ! git -C "$SRC_DIR/libaom" describe --tags --exact-match 2>/dev/null | grep -Fxq "$LIBAOM_TAG"; then
+        log "Update existing libaom source to $LIBAOM_TAG..."
+        git -C "$SRC_DIR/libaom" fetch --depth 1 origin "refs/tags/$LIBAOM_TAG:refs/tags/$LIBAOM_TAG"
+        git -C "$SRC_DIR/libaom" checkout --detach "$LIBAOM_TAG"
+    fi
     cd "$SRC_DIR/libaom"
     mkdir -p build && cd build
     log "Configure libaom..."