[latexila/wip/build-system-update: 1/2] build: use AX_IS_RELEASE

[Sébastien Wilmet <swilmet src gnome org>]

commit cd5ef11fa80e62808f284a8f8f00a2ef45734359
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Sun Dec 18 14:54:52 2016 +0100

    build: use AX_IS_RELEASE
    
    https://wiki.gnome.org/Projects/GnomeCommon/Migration

 configure.ac |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 11c0558..b73207a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -10,6 +10,9 @@ AC_INIT([LaTeXila],
        [latexila],
        [https://wiki.gnome.org/Apps/LaTeXila])
 
+AX_REQUIRE_DEFINED([AX_IS_RELEASE])
+AX_IS_RELEASE([git-directory])
+
 AC_CONFIG_SRCDIR([src/liblatexila/latexila.h])
 AC_CONFIG_HEADERS([config.h])
 AC_CONFIG_MACRO_DIR([m4])