[C++]: Retarget to CMake version 3.0.2

Author: didenko

CMakeLists.txt

@@ -13,7 +13,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-cmake_minimum_required(VERSION 2.8.5 FATAL_ERROR)
+
+cmake_minimum_required(VERSION 3.0.2 FATAL_ERROR)
+cmake_policy(VERSION 3.0.2)
 
 include(ExternalProject)
 include(CheckLibraryExists)