Add temporary workaround for boringssl attempting to access the auxillary vector

sky/shell/ios/main_ios.mm

 // 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 <UIKit/UIKit.h>
 #include <asl.h>
 #import "sky_app_delegate.h"
 #include "base/at_exit.h"
 #include "base/logging.h"
 #include "base/i18n/icu_util.h"
 #include "base/command_line.h"
 #include "base/mac/scoped_nsautorelease_pool.h"
 #include "ui/gl/gl_surface.h"
 
+extern "C" {
+// TODO(csg): HACK! boringssl accesses this on Android using a weak symbol
+// instead of a global. Till the patch for that lands and propagates to Sky, we
+// specify the same here to get workable builds on iOS. This is a hack! Will
+// go away.
+unsigned long getauxval(unsigned long type) {
+  return 0;
+}
+}
+
 static void InitializeLogging() {
   logging::LoggingSettings settings;
   settings.logging_dest = logging::LOG_TO_SYSTEM_DEBUG_LOG;
   logging::InitLogging(settings);
   logging::SetLogItems(false,   // Process ID
                        false,   // Thread ID
                        false,   // Timestamp
                        false);  // Tick count
 }
 
@@ skipping 26 matching lines @@
   result = base::CommandLine::Init(0, nullptr);
   DLOG_ASSERT(result);
   InitializeLogging();
   result = base::i18n::InitializeICU();
   DLOG_ASSERT(result);
   result = gfx::GLSurface::InitializeOneOff();
   DLOG_ASSERT(result);
   return UIApplicationMain(argc, argv, nil,
                            NSStringFromClass([SkyAppDelegate class]));
 }