[GN/iOS] Create a symlink to iossim for compatibility with gyp.

build/config/ios/rules.gni

 # 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/ios/ios_sdk.gni")
 import("//build/config/mac/rules.gni")
 
 # TODO(crbug.com/297668): refactor this template to extract common behaviour
 # between OS X and iOS bundle generation, then create a generic "app" template
 # that forward to "executable" on all platform except iOS/OS X.
@@ skipping 135 matching lines @@
     }
     deps += [
       ":$_bundle_data_executable",
       ":$_bundle_data_info_plist",
     ]
 
     if (use_ios_simulator) {
       if (!defined(data_deps)) {
         data_deps = []
       }
-      data_deps += [ "//testing/iossim(${host_toolchain})" ]
+      data_deps += [ "//testing/iossim" ]
     }
 
     bundle_root_dir = "$root_out_dir/$_output_name.app"
     bundle_resources_dir = bundle_root_dir
     bundle_executable_dir = bundle_root_dir
     bundle_plugins_dir = "$bundle_root_dir/Plugins"
   }
 
   # TODO(crbug.com/297668):
   # - add support for codesigning,
@@ skipping 176 matching lines @@
 
     if (defined(_public_headers)) {
       configs += [ ":$_headers_map_config" ]
       if (!defined(deps)) {
         deps = []
       }
       deps += [ ":$_framework_headers_target" ]
     }
   }
 }