[ios] Adds reading_list and first_run resources

ios/chrome/browser/ui/first_run/BUILD.gn

Index: ios/chrome/browser/ui/first_run/BUILD.gn
diff --git a/ios/chrome/browser/ui/first_run/BUILD.gn b/ios/chrome/browser/ui/first_run/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..57823a45a10436c3d84ae76439544dcd93318973
--- /dev/null
+++ b/ios/chrome/browser/ui/first_run/BUILD.gn
@@ -0,0 +1,23 @@
+# Copyright 2016 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.
+
+bundle_data("assets") {
+  sources = [
+    "resources/FirstRun.xcassets/checkbox.imageset/Contents.json",
+    "resources/FirstRun.xcassets/checkbox.imageset/checkbox.png",
+    "resources/FirstRun.xcassets/checkbox.imageset/checkbox@2x.png",
+    "resources/FirstRun.xcassets/checkbox.imageset/checkbox@2x~ipad.png",
+    "resources/FirstRun.xcassets/checkbox.imageset/checkbox@3x.png",
+    "resources/FirstRun.xcassets/checkbox.imageset/checkbox~ipad.png",
+    "resources/FirstRun.xcassets/checkbox_checked.imageset/Contents.json",
+    "resources/FirstRun.xcassets/checkbox_checked.imageset/checkbox_checked.png",
+    "resources/FirstRun.xcassets/checkbox_checked.imageset/checkbox_checked@2x.png",
+    "resources/FirstRun.xcassets/checkbox_checked.imageset/checkbox_checked@2x~ipad.png",
+    "resources/FirstRun.xcassets/checkbox_checked.imageset/checkbox_checked@3x.png",
+    "resources/FirstRun.xcassets/checkbox_checked.imageset/checkbox_checked~ipad.png",
+  ]
+  outputs = [
+    "{{bundle_resources_dir}}/{{source_file_part}}",
+  ]
+}