Move CodeGenOptions from Frontend to Basic

Basic uses CodeGenOptions and should not depend on Frontend.

llvm-svn: 348827
diff --git a/clang/lib/CodeGen/CGCXX.cpp b/clang/lib/CodeGen/CGCXX.cpp
index 4e524b0..8b0733f 100644
--- a/clang/lib/CodeGen/CGCXX.cpp
+++ b/clang/lib/CodeGen/CGCXX.cpp
@@ -23,7 +23,7 @@
 #include "clang/AST/Mangle.h"
 #include "clang/AST/RecordLayout.h"
 #include "clang/AST/StmtCXX.h"
-#include "clang/Frontend/CodeGenOptions.h"
+#include "clang/Basic/CodeGenOptions.h"
 #include "llvm/ADT/StringExtras.h"
 using namespace clang;
 using namespace CodeGen;