Android: Add chrome-specific dynamic linker.

third_party/crazy_linker/crazy_linker/src/elf_traits.h

+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef _ELF_TRAITS_H_
+#define _ELF_TRAITS_H_
+
+// NOTE: <stdint.h> is required here before <elf.h>. This is a NDK header bug.
+#include <stdint.h>
+#include <elf.h>
+#include <sys/exec_elf.h>
+
+// ELF is a traits structure used to provide convenient aliases for
+// 32/64 bit Elf types, depending on the target CPU bitness.
+#if __SIZEOF_POINTER__ == 4
+struct ELF {
+  typedef Elf32_Ehdr Ehdr;
+  typedef Elf32_Phdr Phdr;
+  typedef Elf32_Word Word;
+  typedef Elf32_Addr Addr;
+  typedef Elf32_Dyn Dyn;
+  typedef Elf32_Sym Sym;
+  typedef Elf32_Rel Rel;
+  typedef Elf32_auxv_t auxv_t;
+};
+#elif __SIZEOF_POINTER__ == 8
+struct ELF {
+  typedef Elf64_Ehdr Ehdr;
+  typedef Elf64_Phdr Phdr;
+  typedef Elf64_Word Word;
+  typedef Elf64_Addr Addr;
+  typedef Elf64_Dyn Dyn;
+  typedef Elf64_Sym Sym;
+  typedef Elf64_Rel Rel;
+  typedef Elf64_auxv_t auxv_t;
+};
+#else
+#error "Unsupported target CPU bitness"
+#endif
+
+#ifdef __arm__
+#define ELF_MACHINE EM_ARM
+#elif defined(__i386__)
+#define ELF_MACHINE EM_386
+#elif defined(__mips__)
+#define ELF_MACHINE EM_MIPS
+#else
+#error "Unsupported target CPU architecture"
+#endif
+
+#endif  // _ELF_TRAITS_H_