Minidumper: Get the nexe's build ID from PT_NOTE when available

src/include/elf32.h

 /*
  * Copyright (c) 2011 The Native Client Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 /* @file
  *
  * Minimal ELF header declaration / constants for Elf32* values.
  * Constants are defined only for fields that are actualy
@@ skipping 66 matching lines @@
   Elf32_Word  sh_flags;
   Elf32_Addr  sh_addr;
   Elf32_Off   sh_offset;
   Elf32_Word  sh_size;
   Elf32_Word  sh_link;
   Elf32_Word  sh_info;
   Elf32_Word  sh_addralign;
   Elf32_Word  sh_entsize;
 } Elf32_Shdr;
 
+typedef struct {
+  Elf32_Word n_namesz;
+  Elf32_Word n_descsz;
+  Elf32_Word n_type;
+} Elf32_Nhdr;
+
 /*
  * The auxiliary vector is passed on the stack between ELF loaders,
  * dynamic linkers, and program startup code.  The gratuitous union
  * is the historical standard API, though it has no purpose today.
  */
 typedef struct {
   Elf32_Word a_type;            /* Entry type */
   union {
       Elf32_Word a_val;         /* Integer value */
     } a_un;
 } Elf32_auxv_t;
 
 
 EXTERN_C_END
 
 #endif  /* NATIVE_CLIENT_SRC_INCLUDE_ELF32_H_ */