core: Compile again on GLib 2.28

src/daemon/ot-daemon.c

@@ -183,7 +183,7 @@ do_op_overlay (OstreeDaemon            *self,
   tdata->op = op;
   tdata->dir = ot_gfile_new_for_path (dir);
 
-#if GLIB_CHECK_VERSION(2,32,0)  
+#if GLIB_CHECK_VERSION(2,32,0) && !defined(OSTREE_GLIB_TARGET_MIN)
   g_thread_new ("overlay-dir-thread", overlay_dir_thread, tdata);
 #else
   g_thread_create_full (overlay_dir_thread, tdata, 0, FALSE, FALSE,