update hetmet subrepository pointer

diff --git a/compiler/hetmet b/compiler/hetmet
index ab2e068..54e3d85 160000 (submodule)
--- a/compiler/hetmet
+++ b/compiler/hetmet
@@ -1 +1 @@
-Subproject commit ab2e0681a81695cc2380b007f2a3314005ec1c99
+Subproject commit 54e3d85658516dcf7d8504e94f973a87e255f8f3