Add Fuchsia disclaimer (and copyright)

Change-Id: Iaeb0721dc3144e6e287ae18a61f03a7d18d5e4ce
diff --git a/CMakeLists.txt b/CMakeLists.txt
index fa0bc5f..3ad1eeb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,3 +1,18 @@
+# Copyright 2017 The Fuchsia Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+#############################################################
+#                NOTE TO FUCHSIA DEVELOPERS
+#
+# Do not use CMake within the Fuchsia project. This CMake file is
+# used only for the Cobalt stand-alone build, not for building
+# Cobalt's Fuchsia client, nor any other component of Fuchsia.
+#
+# See:
+# https://fuchsia.atlassian.net/projects/CB/issues/CB-61
+#############################################################
+
 CMAKE_MINIMUM_REQUIRED (VERSION 2.8.12)
 
 PROJECT (c-ares C)