[cogl] Build a .xz file on release instead of a .bzip2 file

[Neil Roberts <nroberts src gnome org>]

commit cd20c869f303a3526335e77b1913c0555e226a3f
Author: Neil Roberts <neil linux intel com>
Date:   Mon Sep 2 19:48:15 2013 +0100

    Build a .xz file on release instead of a .bzip2 file
    
    Previously when we released a .bzip2 file the Gnome release scripts
    will just convert this to a .xz file and generate its own checksum.
    The .bzip2 is never actually available on the FTP server. This isn't
    ideal because we were listing the checksum of the .bzip2 file in the
    release message but that is useless information. This patch changes it
    to generate a .xz file instead which is also what Clutter does.
    
    Reviewed-by: Robert Bragg <robert linux intel com>

 build/autotools/Makefile.am.release |    2 +-
 configure.ac                        |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/build/autotools/Makefile.am.release b/build/autotools/Makefile.am.release
index ad2b818..afd0878 100644
--- a/build/autotools/Makefile.am.release
+++ b/build/autotools/Makefile.am.release
@@ -12,7 +12,7 @@ RELEASE_ANNOUNCE_CC   = gnome-announce-list gnome org
 
 RELEASE_DOC_URL = http://docs.clutter-project.org/docs/
 
-tar_file    = $(distdir).tar.bz2
+tar_file    = $(distdir).tar.xz
 sha256_file = $(distdir).sha256sum
 
 $(sha256_file): $(tar_file)
diff --git a/configure.ac b/configure.ac
index a81d15b..14f284d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -107,7 +107,7 @@ AC_SUBST([WAYLAND_SERVER_REQ_VERSION], [wayland_server_req_version])
 cflags_set=${CFLAGS+set}
 
 AM_INIT_AUTOMAKE([1.11 foreign -Wno-portability no-define no-dist-gzip
-                  dist-bzip2 tar-ustar])
+                  dist-xz tar-ustar])
 AM_SILENT_RULES([yes])
 
 AH_BOTTOM([#include "config-custom.h"])