Merge pull request #353 from Infinoid/cmake-policy-0054

Silence a warning about cmake policy CMP0054.

Author: stephenchouca

CMakeLists.txt

@@ -1,4 +1,7 @@
 cmake_minimum_required(VERSION 2.8.12 FATAL_ERROR)
+if(POLICY CMP0054)
+  cmake_policy(SET CMP0054 NEW)
+endif()
 project(taco)
 option(CUDA "Build for NVIDIA GPU (CUDA must be preinstalled)" OFF)
 option(PYTHON "Build TACO for python environment" OFF)