Code review. Thx `greg-lunarg` for comments.

CMakeLists.txt

@@ -31,9 +31,9 @@
 # ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 # POSSIBILITY OF SUCH DAMAGE.
 
-cmake_minimum_required(VERSION 2.8.12)
 # increase to 3.1 once all major distributions
 # include a version of CMake >= 3.1
+cmake_minimum_required(VERSION 2.8.12)
 if (POLICY CMP0048)
   cmake_policy(SET CMP0048 NEW)
 endif()