Add and run clang format script

Summary: This code used to be auto generated. Let's let clang-format clean up some stuff for us.

Reviewed By: lucasr

Differential Revision: D3662225

fbshipit-source-id: ddd4064cbf9be21ca6a97001ace1b56b4314c86f

format.sh

@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+
+clang-format \
+  -style="{ \
+    BasedOnStyle: WebKit, \
+    IndentWidth: 2, \
+    ColumnLimit: 100, \
+    BreakBeforeBraces: Attach, \
+    BinPackParameters: false, \
+    PointerAlignment: Right, \
+  }" "$@" \
+  -i ./**/*.{h,c,cpp}