Update rustfmt to fix compile

alexcrichton · alexcrichton · commit 84fdaf058a57 · 2018-04-20T19:34:52.000-07:00
diff --git a/src/tools/rustfmt b/src/tools/rustfmt
@@ -1 +1 @@
-Subproject commit a4462d18bf6b92aaec1eeb1c30d5ddf94a3ca987
+Subproject commit 7a80726258d38b91ebb12144a2c2dd5d422cdfa8
