Add a host tool to pack R_ARM_RELATIVE relocations in libchrome.<ver>.so.

tools/relocation_packer/relocation_packer.gyp

Index: tools/relocation_packer/relocation_packer.gyp
diff --git a/tools/relocation_packer/relocation_packer.gyp b/tools/relocation_packer/relocation_packer.gyp
new file mode 100644
index 0000000000000000000000000000000000000000..74d21a1f90287d04e0369db3f3744c9d0f8b2841
--- /dev/null
+++ b/tools/relocation_packer/relocation_packer.gyp
@@ -0,0 +1,66 @@
+# Copyright (c) 2014 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.
+
+{
+  'targets': [
+    {
+      'target_name': 'lib_relocation_packer',
+      'toolsets': ['host'],
+      'type': 'static_library',
+      'dependencies': [
+        '../../third_party/elfutils/elfutils.gyp:libelf',
+      ],
+      'sources': [
+        'src/debug.cc',
+        'src/elf_file.cc',
+        'src/leb128.cc',
+        'src/packer.cc',
+        'src/run_length_encoder.cc',
+      ],
+    },
+    {
+      'target_name': 'relocation_packer',
+      'toolsets': ['host'],
+      'type': 'executable',
+      'dependencies': [
+        '../../third_party/elfutils/elfutils.gyp:libelf',
+        'lib_relocation_packer',
+      ],
+      'sources': [
+        'src/main.cc',
+      ],
+    },
+    {
+      'target_name': 'relocation_packer_unittests',
+      'toolsets': ['host'],
+      'type': 'executable',
+      'cflags': [
+        '-DINTERMEDIATE_DIR="<(INTERMEDIATE_DIR)"',
+      ],
+      'dependencies': [
+        '../../testing/gtest.gyp:gtest',
+        'lib_relocation_packer',
+      ],
+      'include_dirs': [
+        '../..',
+      ],
+      'sources': [
+        'src/elf_file_unittest.cc',
+        'src/leb128_unittest.cc',
+        'src/packer_unittest.cc',
+        'src/run_length_encoder_unittest.cc',
+        'src/run_all_unittests.cc',
+      ],
+      'copies': [
+        {
+          'destination': '<(INTERMEDIATE_DIR)',
+          'files': [
+            'test_data/elf_file_unittest_relocs.so',
+            'test_data/elf_file_unittest_relocs_packed.so',
+          ],
+        },
+      ],
+    },
+  ],
+}