[gnome-panel/gnome-3-30] clock: fix build

[Alberts Muktupāvels <muktupavels src gnome org>]

commit 77be9c3507bd1b5d70d97649b85ec9f47f6c359c
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Wed Sep 12 19:32:12 2018 +0300

    clock: fix build
    
    https://gitlab.gnome.org/GNOME/gnome-panel/issues/8

 configure.ac | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/configure.ac b/configure.ac
index e9f3adfc5..a4a01a21d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -196,6 +196,7 @@ AC_CHECK_FUNCS(nl_langinfo)
 PKG_CHECK_MODULES([CLOCK], [
   dconf >= $DCONF_REQUIRED
   gio-2.0 >= $GLIB_REQUIRED
+  gio-unix-2.0 >= $GLIB_REQUIRED
   glib-2.0 >= $GLIB_REQUIRED
   gnome-desktop-3.0 >= $LIBGNOME_DESKTOP_REQUIRED
   gtk+-3.0 >= $GTK_REQUIRED