Work around iossim compile issues on latest Xcode beta.

third_party/class-dump/BUILD.gn

 # Copyright 2016 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.
 
 config("config") {
   visibility = [ ":class-dump" ]
-  libs = [
-    "Foundation.framework",
-    "crypto",
-  ]
+  libs = [ "Foundation.framework" ]
 
   # TODO(crbug.com/595295): Building class-dump tools requires OS X SDK
   # version 10.9 or higher. Remove this override once the global version
   # of the SDK is raised.
   common_flags = [ "-mmacosx-version-min=10.9" ]
   ldflags = common_flags
   cflags_objc = common_flags
 
   cflags_objc += [
     "-Wno-semicolon-before-method-body",
@@ skipping 167 matching lines @@
     ":config",
     "//build/config/compiler:enable_arc",
     "//build/config/compiler:no_chromium_code",
   ]
 
   # TODO(crbug.com/595295): Building class-dump tools requires OS X SDK
   # version 10.9 or higher. To prevent mixing code using different value
   # of minimum SDK supported, forbids dependencies on any Chromium target.
   assert_no_deps = [ "//base/*" ]
 }