Update rustfmt submodule

diff --git a/src/tools/rustfmt b/src/tools/rustfmt
index 08da30d72c9abfff4d41f6f081e31fd2929b820d..87edd75ecf26c9084969f431bb5e363693a8a4ca 160000 (submodule)
--- a/src/tools/rustfmt
+++ b/src/tools/rustfmt
@@ -1 +1 @@
-Subproject commit 08da30d72c9abfff4d41f6f081e31fd2929b820d
+Subproject commit 87edd75ecf26c9084969f431bb5e363693a8a4ca