LLVM: Add ELF Note section to NaCl object files identifying them as such to gold

include/llvm/MC/MCNaCl.h

+//===- MCNaCl.h - NaCl-specific code for MC  --------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+namespace llvm {
+class MCContext;
+class MCStreamer;
+class Triple;
+/// Initialize target-specific bundle alignment and emit target-specific NaCl
+/// ELF note sections.
+void initializeNaClMCStreamer(MCStreamer &Streamer, MCContext &Ctx,
+                              const Triple &TheTriple);
+}