Unbreak build with gcc 4.3: provide missed includes and silence most annoying warnings.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47367 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/MachOWriter.cpp b/lib/CodeGen/MachOWriter.cpp
index 92b3eb4..d163df3 100644
--- a/lib/CodeGen/MachOWriter.cpp
+++ b/lib/CodeGen/MachOWriter.cpp
@@ -38,6 +38,7 @@
 #include "llvm/Support/OutputBuffer.h"
 #include "llvm/Support/Streams.h"
 #include <algorithm>
+#include <cstring>
 using namespace llvm;
 
 /// AddMachOWriter - Concrete function to add the Mach-O writer to the function