Updated miri submodule.

Alexander Regueiro · Alexander Regueiro · commit 6660c25045ec · 2018-07-02T17:18:38.000+01:00
diff --git a/src/tools/miri b/src/tools/miri
@@ -1 +1 @@
-Subproject commit 9143a69f4b3ef4bda77afddefe934be363e39f31
+Subproject commit 5b7bb32b0e46d195b80c4da09b560ac7fc92015d
