Update ggml layer

diff --git a/sources/ggml b/sources/ggml
index ed1620c8bda50cd6903c80bb0e04cac6a5669d97..97bbab2573770c964350b34fa76b8934bd74590f 160000 (submodule)
--- a/sources/ggml
+++ b/sources/ggml
@@ -1 +1 @@
-Subproject commit ed1620c8bda50cd6903c80bb0e04cac6a5669d97
+Subproject commit 97bbab2573770c964350b34fa76b8934bd74590f