Create .mojo applications in a common subdir under out/Debug

components/mus/BUILD.gn

 # Copyright 2015 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("//build/config/ui.gni")
 import("//testing/test.gni")
 import("//mojo/public/mojo_application.gni")
 import("//mojo/public/mojo_application_manifest.gni")
+import("//mojo/public/mojo_constants.gni")
 import("//tools/grit/repack.gni")
 
 if (is_android) {
   import("//build/config/android/config.gni")
   import("//build/config/android/rules.gni")
 
   source_set("mus") {
     sources = [
       "android_loader.cc",
       "android_loader.h",
@@ skipping 41 matching lines @@
       "//third_party/angle:libEGL",
       "//third_party/angle:libGLESv2",
     ]
 
     sources = [
       "$root_shlib_dir/libEGL.dll",
       "$root_shlib_dir/libGLESv2.dll",
     ]
 
     outputs = [
-      "$root_out_dir/mus/{{source_file_part}}",
+      "$root_out_dir/$mojo_application_subdir/mus/{{source_file_part}}",
     ]
   }
 }
 
 source_set("lib") {
   sources = [
     "mus_app.cc",
     "mus_app.h",
   ]
 
@@ skipping 32 matching lines @@
 
   if (use_ozone) {
     deps += [ "//ui/ozone:ozone" ]
   }
 }
 
 repack("resources_strings") {
   sources = [
     "$root_gen_dir/ui/strings/app_locale_settings_en-US.pak",
   ]
-  output = "$root_out_dir/mus/resources/mus_app_resources_strings.pak"
+  output = "$root_out_dir/$mojo_application_subdir/mus/resources/mus_app_resources_strings.pak"
   deps = [
     "//ui/strings",
   ]
 }
 
 repack("resources_100") {
   sources = [
     "$root_gen_dir/ui/resources/ui_resources_100_percent.pak",
   ]
-  output = "$root_out_dir/mus/resources/mus_app_resources_100.pak"
+  output = "$root_out_dir/$mojo_application_subdir/mus/resources/mus_app_resources_100.pak"
   deps = [
     "//ui/resources",
   ]
 }
 
 repack("resources_200") {
   sources = [
     "$root_gen_dir/ui/resources/ui_resources_200_percent.pak",
   ]
-  output = "$root_out_dir/mus/resources/mus_app_resources_200.pak"
+  output = "$root_out_dir/$mojo_application_subdir/mus/resources/mus_app_resources_200.pak"
   deps = [
     "//ui/resources",
   ]
 }