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

include/llvm/Support/ELF.h

 //===-- llvm/Support/ELF.h - ELF constants and data structures --*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // This header contains common, non-processor-specific data structures and
@@ skipping 1306 matching lines @@
 
 // Segment flag bits.
 enum {
   PF_X        = 1,         // Execute
   PF_W        = 2,         // Write
   PF_R        = 4,         // Read
   PF_MASKOS   = 0x0ff00000,// Bits for operating system-specific semantics.
   PF_MASKPROC = 0xf0000000 // Bits for processor-specific semantics.
 };
 
+// @LOCALMOD-BEGIN
+// Note segment descriptor types (for object files).
+enum {
+  NT_VERSION  = 1          // Note contains a version string.

[eliben, 2013/05/10 23:43:22]

Is this upstreamable?

+};
+// @LOCALMOD-END
+
 // Dynamic table entry for ELF32.
 struct Elf32_Dyn
 {
   Elf32_Sword d_tag;            // Type of dynamic table entry.
   union
   {
       Elf32_Word d_val;         // Integer value of entry.
       Elf32_Addr d_ptr;         // Pointer value of entry.
   } d_un;
 };
@@ skipping 118 matching lines @@
 enum {
   VER_NEED_NONE = 0,
   VER_NEED_CURRENT = 1
 };
 
 } // end namespace ELF
 
 } // end namespace llvm
 
 #endif