$NetBSD: patch-configure,v 1.1 2016/12/02 19:07:16 maya Exp $

attempt to use -lexecinfo on all BSDs, not just freebsd.
needed for libc++ users

--- configure.orig	2016-10-10 15:42:42.000000000 +0000
+++ configure
@@ -12389,7 +12389,7 @@ fi
 lyx_win_res=false;
 case ${host} in
     *mingw*|*cygwin*) lyx_win_res=true;;
-    *freebsd*) { $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing backtrace_symbols" >&5
+    *bsd*) { $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing backtrace_symbols" >&5
 $as_echo_n "checking for library containing backtrace_symbols... " >&6; }
 if ${ac_cv_search_backtrace_symbols+:} false; then :
   $as_echo_n "(cached) " >&6