GN(android) Don't enable --gc-sections in debug mode.

mojo/runner/BUILD.gn

 # Copyright 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.
 
 import("//mojo/public/mojo_application.gni")
 import("//mojo/public/tools/bindings/mojom.gni")
 import("//testing/test.gni")
 
 group("runner") {
   testonly = true
@@ skipping 208 matching lines @@
     deps = [
       "//base:base_java",
     ]
 
     dex_path = "$target_out_dir/bootstrap_java.dex.jar"
   }
 
   shared_library("bootstrap") {
     sources = [
       "android/bootstrap.cc",
+      "register_local_aliases.cc",
+      "register_local_aliases.h",
     ]
     deps = [
       ":jni_headers",
       ":lib",
       ":run_android_application_function",
       "//base",
       "//build/config/sanitizers:deps",
     ]
   }
 
@@ skipping 77 matching lines @@
       ":copy_mojo_runner",
       ":java",
       ":mojo_runner_apptests_assets",
       ":resources",
       "//base:base_java",
       "//ui/platform_window/android:platform_window_java",
       google_play_services_resources,
     ]
   }
 }