File reproducible.patch of Package mailman

Description: Make the build reproducible
Author: Bernhard M. Wiedemann <bwiedemann suse de> + Chris Lamb <lamby@debian.org>
Last-Update: 2018-08-22

Based on https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=889637

Index: mailman-2.1.35/configure
===================================================================
--- mailman-2.1.35.orig/configure
+++ mailman-2.1.35/configure
@@ -2144,7 +2144,7 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 CONFIGURE_OPTS=`echo $@`
 
-BUILD_DATE=`date`
+BUILD_DATE=`date -u -r NEWS || date`
 
 
 # Check for Python!  Better be found on $PATH