update clippy to the rustc-pr-67224 branch

nikomatsakis · nikomatsakis · commit 96d18ac479ed · 2019-12-14T15:22:24.000-05:00
Actually to commit &lt;69f99e74ac2266dff4b5adc7c59b35236f0abef1&gt;.
diff --git a/src/tools/clippy b/src/tools/clippy
@@ -1 +1 @@
-Subproject commit 374db5c0b7a8ebc92ecb35ee21e11961da6c754d
+Subproject commit 69f99e74ac2266dff4b5adc7c59b35236f0abef1
