[evolution-data-server] Bug 793491 - Enable C++11 and C++14 when available

[Milan Crha <mcrha src gnome org>]

commit dbcd2a8168f69867ed2981ac25b0c95c3d0cc504
Author: Ting-Wei Lan <lantw src gnome org>
Date:   Fri Feb 16 02:25:56 2018 +0800

    Bug 793491 - Enable C++11 and C++14 when available

 CMakeLists.txt |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 17e4862..0593719 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -6,6 +6,7 @@ cmake_policy(VERSION 3.1)
 project(evolution-data-server
        VERSION 3.27.92
        LANGUAGES C CXX)
+set(CMAKE_CXX_STANDARD 14)
 set(PROJECT_BUGREPORT "http://bugzilla.gnome.org/enter_bug.cgi?product=Evolution-Data-Server";)
 
 # Base Version: This is for API/version tracking for things like