Update build configuration to support iOS targets

build/config/ios/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("//build/config/sysroot.gni")
 import("//build/config/ios/ios_sdk.gni")
 
 config("sdk") {
   common_flags = [
     "-isysroot",
     sysroot,
   ]
 
+  if (use_ios_simulator) {
+    common_flags += [ "-mios-simulator-version-min=$ios_deployment_target" ]
+  } else {
+    common_flags += [ "-miphoneos-version-min=$ios_deployment_target" ]
+  }
+
   cflags = common_flags
   ldflags = common_flags
-
-  if (use_ios_simulator) {
-    cflags += [ "-mios-simulator-version-min=$ios_deployment_target" ]
-  } else {
-    cflags += [ "-miphoneos-version-min=$ios_deployment_target" ]
-  }
 }