Add some missing #includes for GCC mainline, patch by Shantonu Sen!
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@48153 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/Lex/ScratchBuffer.cpp b/Lex/ScratchBuffer.cpp
index bf0d88e..99fbdf7 100644
--- a/Lex/ScratchBuffer.cpp
+++ b/Lex/ScratchBuffer.cpp
@@ -14,6 +14,7 @@
#include "clang/Lex/ScratchBuffer.h"
#include "clang/Basic/SourceManager.h"
#include "llvm/Support/MemoryBuffer.h"
+#include <cstring>
using namespace clang;
// ScratchBufSize - The size of each chunk of scratch memory. Slightly less