[scudo] Rearrange #include order

[cryptoad]

Summary

To be compliant with https://llvm.org/docs/CodingStandards.html#include-style,
system headers have to come after local headers.

[cryptoad]

Additionally correct a ClangTidy warning (parameter consistency).

lib/scudo/scudo_utils.h

 //===-- scudo_utils.h -------------------------------------------*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// Header for scudo_utils.cpp.
 ///
 //===----------------------------------------------------------------------===//
 
 #ifndef SCUDO_UTILS_H_
 #define SCUDO_UTILS_H_
 
-#include <string.h>
-
 #include "sanitizer_common/sanitizer_common.h"
 
+#include <string.h>
+
 namespace __scudo {
 
 template <class Dest, class Source>
 inline Dest bit_cast(const Source& source) {
   static_assert(sizeof(Dest) == sizeof(Source), "Sizes are not equal!");
   Dest dest;
   memcpy(&dest, &source, sizeof(dest));
   return dest;