IRGen: adjust for SVN r348827

CodeGenOptions.h was moved from Frontend to Basic.

Author: compnerd

lib/IRGen/IRGenModule.cpp

@@ -34,7 +34,7 @@
 #include "clang/Lex/PreprocessorOptions.h"
 #include "clang/Lex/HeaderSearch.h"
 #include "clang/Lex/HeaderSearchOptions.h"
-#include "clang/Frontend/CodeGenOptions.h"
+#include "clang/Basic/CodeGenOptions.h"
 #include "llvm/IR/IRBuilder.h"
 #include "llvm/IR/Constants.h"
 #include "llvm/IR/DataLayout.h"