Add cutils/log.h

Adding one more very tiny Android file here means fewer changes needed to
compile other files borrowed from Android or Android-x86.

BUG=358029

Review URL: https://codereview.chromium.org/331793003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@277842 0039d316-1c4b-4281-b951-d872f2087c98

third_party/hwcplus/include/cutils/log.h

+// 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.
+
+#include <log/log.h>