[glade] Update Basque language

[Iñaki Larrañaga Murgoitio <dooteo src gnome org>]

commit 0e8b0d7ea540285d1d6936ac9525c68d183dd5f9
Author: Inaki Larranaga Murgoitio <dooteo zundan com>
Date:   Sat Mar 4 17:11:10 2017 +0100

    Update Basque language

 po/eu.po |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/po/eu.po b/po/eu.po
index 3bc1574..35475de 100644
--- a/po/eu.po
+++ b/po/eu.po
@@ -3874,6 +3874,10 @@ msgstr ""
 msgid "Cannot add a toplevel window to a container."
 msgstr "Maila goreneko leiho bat ezin zaio edukiontzi bati gehitu."
 
+# Popover = Bunbuilo
+# 
+# Komikietako "bunbuiloa" bezalakoa da, ez da laster-leiho bat.
+# https://developer.gnome.org/hig/stable/popovers.html.en
 #: ../plugins/gtk+/glade-gtk-container.c:67
 #| msgid "Cannot add a toplevel window to a containter."
 msgid "Cannot add a popover to a container."