[gnome-panel] bump AM_GNU_GETTEXT_VERSION

[Alberts Muktupāvels <muktupavels src gnome org>]

commit bf5da985535c3997ae0ed8e52003d8331c981cff
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Sun Jun 16 22:22:48 2019 +0300

    bump AM_GNU_GETTEXT_VERSION
    
    https://gitlab.gnome.org/GNOME/gnome-panel/issues/13

 configure.ac | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/configure.ac b/configure.ac
index ee47e4598..44eb74212 100644
--- a/configure.ac
+++ b/configure.ac
@@ -78,7 +78,7 @@ dnl Internationalization
 dnl **************************************************************************
 
 AM_GNU_GETTEXT([external])
-AM_GNU_GETTEXT_VERSION([0.19.4])
+AM_GNU_GETTEXT_VERSION([0.19.8])
 
 GETTEXT_PACKAGE=gnome-panel
 AC_SUBST([GETTEXT_PACKAGE])