Pin ggml commit

diff --git a/sources/ggml b/sources/ggml
index f196832b59684030515962711db4b19d848c8b68..d92321c0d151fe73a47d89738c7c3091ac904297 160000 (submodule)
--- a/sources/ggml
+++ b/sources/ggml
@@ -1 +1 @@
-Subproject commit f196832b59684030515962711db4b19d848c8b68
+Subproject commit d92321c0d151fe73a47d89738c7c3091ac904297