[epiphany] Add requested translator comment

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 82e89bfffcc8cbc244ccc6fe684a02a1759d47de
Author: Michael Catanzaro <mcatanzaro igalia com>
Date:   Sun Jan 6 17:42:19 2019 -0600

    Add requested translator comment

 embed/ephy-embed.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/embed/ephy-embed.c b/embed/ephy-embed.c
index b56fe9155..0b101ab14 100644
--- a/embed/ephy-embed.c
+++ b/embed/ephy-embed.c
@@ -815,6 +815,7 @@ ephy_embed_constructed (GObject *object)
 
     info_bar = gtk_info_bar_new ();
     gtk_info_bar_set_message_type (GTK_INFO_BAR (info_bar), GTK_MESSAGE_INFO);
+    /* Translators: this means WebDriver control. */
     label = gtk_label_new (_("Web is being controlled by automation"));
     gtk_box_pack_start (GTK_BOX (gtk_info_bar_get_content_area (GTK_INFO_BAR (info_bar))), label, FALSE, 
FALSE, 0);
     gtk_widget_show (label);