Subzero: Fix symbol name mangling. Make flags global.

src/IceMangling.h

+//===- subzero/src/IceMangling.h - Name mangling for crosstests -*- C++ -*-===//
+//
+//                        The Subzero Code Generator
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// \brief Declares utility functions for name mangling for cross tests.
+///
+//===----------------------------------------------------------------------===//
+
+#ifndef SUBZERO_SRC_ICEMANGLING_H
+#define SUBZERO_SRC_ICEMANGLING_H
+
+#include "IceDefs.h"
+
+namespace Ice {
+
+IceString mangleName(const IceString &Name);
+
+} // end of namespace Ice
+
+#endif // SUBZERO_SRC_ICEMANGLING_H