update Miri

diff --git a/src/tools/miri b/src/tools/miri
index c6b3f687d5d9917b626f80a730552a185052ff28..54b14b7f0110133477e7459a327a0a5cbd18fd41 160000 (submodule)
--- a/src/tools/miri
+++ b/src/tools/miri
@@ -1 +1 @@
-Subproject commit c6b3f687d5d9917b626f80a730552a185052ff28
+Subproject commit 54b14b7f0110133477e7459a327a0a5cbd18fd41