Removing the silly CHelpers header by rolling wrap and unwrap into the C

bindings headers themselves, hidden behind #ifdef __cplusplus.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42666 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Bitcode/Writer/BitWriter.cpp

@@ -9,7 +9,6 @@
 
 #include "llvm-c/BitWriter.h"
 #include "llvm/Bitcode/ReaderWriter.h"
-#include "llvm/Support/CHelpers.h"
 #include <fstream>
 
 using namespace llvm;