promote LLVMBitCodes to be a public header

llvm-svn: 36358
diff --git a/llvm/lib/Bitcode/Reader/BitcodeReader.h b/llvm/lib/Bitcode/Reader/BitcodeReader.h
index 7a69333..e6e24de 100644
--- a/llvm/lib/Bitcode/Reader/BitcodeReader.h
+++ b/llvm/lib/Bitcode/Reader/BitcodeReader.h
@@ -16,7 +16,7 @@
 
 #include "llvm/Type.h"
 #include "llvm/ModuleProvider.h"
-#include "../LLVMBitCodes.h"
+#include "llvm/Bitcode/LLVMBitCodes.h"
 #include <vector>
 
 namespace llvm {