[gnome-system-log] Revert "build: Drop gettext configure rules as it conflicts with intltool"

[Cosimo Cecchi <cosimoc src gnome org>]

commit 106f3f867192826c4d9e982dd9ecbe4b39a3d5e4
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Thu Jun 28 21:31:22 2012 -0400

    Revert "build: Drop gettext configure rules as it conflicts with intltool"
    
    Breaks running autogen.sh on a clean git checkout.
    
    This reverts commit aa0ad83199dd5c766722e3bbdb09ff28040ce293.

 configure.ac |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 433efb5..56df70e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -21,6 +21,9 @@ PKG_PROG_PKG_CONFIG([0.22])
 
 AC_PATH_PROG(GLIB_GENMARSHAL, [glib-genmarshal])
 
+AM_GNU_GETTEXT([external])
+AM_GNU_GETTEXT_VERSION([0.17])
+
 AC_PROG_CC
 AM_PROG_CC_C_O
 AC_PROG_CXX