update vendored flac

sezero · sezero · commit 0f6837d7d6b7 · 2025-09-09T22:05:28.000+03:00
(cherry picked from commit 6c58afb)
diff --git a/external/flac b/external/flac
@@ -1 +1 @@
-Subproject commit b9b41b10b34d037fee6814c2c36373160bd67915
+Subproject commit bc9fab609b7ce849952099ecf3d7c2af750de0de
