Include platform.dill files in sdk builds

utils/generate_patch_sdk.gni

 # Copyright (c) 2017, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 import("../build/prebuilt_dart_sdk.gni")
 import("../build/dart_host_toolchain.gni")
 
 _dart_root = get_path_info("..", "abspath")
 
 # Template to generate a patched_sdk folder. This invokes the tools/patch_sdk.py
@@ skipping 25 matching lines @@
 
     # We list the `patch_sdk.dart` tool here because the [script] (which is
     # implicitly an input) will call it.
     inputs = [
       "$_dart_root/tools/patch_sdk.dart",
     ]
 
     depfile = "$root_out_dir/${target_name}.d"
 
     outputs = [
-      # Instead of listing all outputs we list a single well-known one.
+      # Instead of listing all outputs we list those consumed by
+      # other BUILD rules.
       "$root_out_dir/${invoker.patched_sdk_dir}/platform.dill",
+      "$root_out_dir/${invoker.patched_sdk_dir}/outline.dill",
     ]
 
     args = [ "--quiet" ]
     if (!prebuilt_dart_exe_works) {
       dart_out_dir = get_label_info(
               "$_dart_root/runtime/bin:dart_bootstrap($dart_host_toolchain)",
               "root_out_dir")
       dart_bootstrap =
           rebase_path("$dart_out_dir/dart_bootstrap$executable_suffix")
       args += [
         "--dart-executable",
         dart_bootstrap,
       ]
     }
     args += [
       invoker.mode,
       rebase_path("$_dart_root/sdk"),
       rebase_path(invoker.input_patches_dir),
       rebase_path("$root_out_dir/${invoker.patched_sdk_dir}", root_build_dir),
       rebase_path("$_dart_root/.packages"),
     ]
   }
 }