Update from https://crrev.com/333737

tools/android/forwarder2/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.
 
 # GYP: //tools/android/forwarder2/forwarder.gyp:forwarder2
 group("forwarder2") {
   datadeps = [
     ":host_forwarder($host_toolchain)",
     ":host_forwarder_copy($host_toolchain)",
     ":device_forwarder($default_toolchain)",
@@ skipping 35 matching lines @@
     ]
     datadeps = [
       "//build/android/pylib/device/commands",
     ]
   }
 
   # GYP: //tools/android/forwarder2/forwarder.gyp:forwarder2
   create_native_executable_dist("device_forwarder_prepare_dist") {
     dist_dir = "$root_build_dir/forwarder_dist"
     binary = "$root_build_dir/exe.stripped/device_forwarder"
+    deps = [
+      ":device_forwarder",
+    ]
   }
 }
 
 if (current_toolchain != default_toolchain) {
   # GYP: //tools/android/forwarder2/forwarder.gyp:host_forwarder
   executable("host_forwarder") {
     sources = [
       "command.cc",
       "command.h",
       "common.cc",
@@ skipping 21 matching lines @@
   }
 
   # GYP: //tools/android/forwarder2/forwarder.gyp:forwarder2
   copy("host_forwarder_copy") {
     sources = [
       "$root_out_dir/host_forwarder",
     ]
     outputs = [
       "$root_build_dir/host_forwarder",
     ]
+    deps = [
+      ":host_forwarder",
+    ]
   }
 }