$OpenBSD: patch-configure_ac,v 1.1 2020/09/04 04:24:28 rsadowski Exp $

use c++14 instead of c++11. see:
https://github.com/arvidn/libtorrent/pull/5026

Index: configure.ac
--- configure.ac.orig
+++ configure.ac
@@ -144,7 +144,7 @@ AS_ECHO "Checking for boost libraries:"
 
 AX_BOOST_BASE([1.58])
 
-AX_CXX_COMPILE_STDCXX_11([noext], [mandatory])
+AX_CXX_COMPILE_STDCXX(14, [noext], [mandatory])
 
 AX_BOOST_SYSTEM()
 AS_IF([test -z "$BOOST_SYSTEM_LIB"],
