Update clippy

Manishearth · Manishearth · commit 6c9b3cccbcef · 2018-03-29T13:13:49.000+02:00
diff --git a/src/tools/clippy b/src/tools/clippy
@@ -1 +1 @@
-Subproject commit eafd09010815da43302ac947afee45b0f5219e6b
+Subproject commit b75618206cec71bd87ff7b07f0a8698ee854a2d1
