[zenity] build: default to xz tarballs

[Jeremy Bicha <jbicha src gnome org>]

commit b7da42337a1b40224a8216f790159f38f96c0cf1
Author: Jeremy Bicha <jbicha ubuntu com>
Date:   Sat Feb 3 23:40:46 2018 -0500

    build: default to xz tarballs

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index d0f8f36..b5340be 100644
--- a/configure.ac
+++ b/configure.ac
@@ -6,7 +6,7 @@ AC_CONFIG_HEADERS([config.h])
 AC_CONFIG_SRCDIR([src])
 AC_CONFIG_MACRO_DIR([m4])
 
-AM_INIT_AUTOMAKE([1.10 foreign dist-bzip2 no-dist-gzip])
+AM_INIT_AUTOMAKE([1.10 foreign no-dist-gzip dist-xz])
 AM_MAINTAINER_MODE([enable])
 
 m4_ifdef([AM_SILENT_RULES],[AM_SILENT_RULES([yes])])