[iOS/OS X] Add Security.framework to //crypto link flags.

crypto/BUILD.gn

 # Copyright (c) 2013 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/crypto.gni")
 import("//testing/test.gni")
 
 component("crypto") {
   output_name = "crcrypto"  # Avoid colliding with OpenSSL's libcrypto.
   sources = [
@@ skipping 94 matching lines @@
     "//base",
     "//base/third_party/dynamic_annotations",
   ]
 
   if (!is_mac && !is_ios) {
     sources -= [
       "apple_keychain.h",
       "mock_apple_keychain.cc",
       "mock_apple_keychain.h",
     ]
+  } else {
+    libs = [ "Security.framework" ]
   }
 
   if (!is_mac) {
     sources -= [
       "cssm_init.cc",
       "cssm_init.h",
       "mac_security_services_lock.cc",
       "mac_security_services_lock.h",
     ]
   }
@@ skipping 227 matching lines @@
       public_configs += [ "//third_party/nss:system_nss_no_ssl_config" ]
     } else {
       # Non-Linux platforms use the hermetic NSS from the tree.
       public_deps += [
         "//third_party/nss:nspr",
         "//third_party/nss:nss",
       ]
     }
   }
 }