Update clippy

Manishearth · Manishearth · commit 536005aefcf7 · 2018-07-16T16:30:15.000-07:00
Fixes test failures caused by rust-lang#52081
diff --git a/src/tools/clippy b/src/tools/clippy
@@ -1 +1 @@
-Subproject commit 8f61a792f4f54f24adf9a8cb7824bfdb259c50ef
+Subproject commit 3246a1f5c0ecd85e53f9d2564305a3f7f063064e
