bug#23001: emacs in X has icons missing and throws warnings in tty

[myglc2]

When running GuixSD on a headless server  ...

ssh
emacs

... produces emacs running in X but ...

- all of the menu icons are missing except one ('file drawers')

- lots of messages are shooting in the tty session (sample below).

This actually doesn't bother me because, hey, who uses the stinking
icons? But it is messy and <JeanLouis> on #guix reported the same thing:

VVVVVVVVVVVVVVVVVVVVVV
<JeanLouis> I was expecting if I do -i emacs -- to get binary emacs, not the
            ony that was compiled without gdk-pixbuf incorrectly
<mark_weaver> JeanLouis: what do you mean by "that was compiled without
              gdk-pixbuf incorrectly" ?
<JeanLouis> https://rcdrun.com/images/upload/tmp/2016-03-12-23:41:52.jpg
<JeanLouis> that is what I mean
<JeanLouis> (emacs-24-5:28561): Gdk-CRITICAL **:
            gdk_cairo_surface_create_from_pixbuf: assertion 'GDK_IS_PIXBUF
            (pixbuf)' failed                                            [18:06]
<JeanLouis> I get many such when running it.
<JeanLouis> buttons missing
^^^^^^^^^^^^^^^^^^^^^^

Here is my setup:

M-x version:
GNU Emacs 24.5.1 (x86_64-unknown-linux-gnu, GTK+ Version 3.18.2) of
2016-02-27 on localhost

Guix commit:
* master 81a9653 gnu: webkitgtk: Update to 2.10.8 [fixes CVE-2016-1726].

Example of the messages in the tty session:
VVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVV
** (emacs-24-5:18164): WARNING **: Couldn't connect to accessibility bus: 
Failed to connect to socket /tmp/dbus-JHb3wYZmX7: Connection refused

(emacs-24-5:18164): Gtk-WARNING **: Could not find the icon 'document-new'. The 
'hicolor' theme
was not found either, perhaps you need to install it.
You can get a copy from:
        http://icon-theme.freedesktop.org/releases

(emacs-24-5:18164): Gtk-WARNING **: Error loading theme icon 'document-new' for 
stock: Icon 'document-new' not present in theme Adwaita

(emacs-24-5:18164): Gtk-WARNING **: Error loading theme icon 'image-missing' 
for stock: Icon 'image-missing' not present in theme Adwaita

(emacs-24-5:18164): GLib-GObject-CRITICAL **: g_object_ref: assertion 
'G_IS_OBJECT (object)' failed

(emacs-24-5:18164): Gdk-CRITICAL **: gdk_cairo_surface_create_from_pixbuf: 
assertion 'GDK_IS_PIXBUF (pixbuf)' failed

(emacs-24-5:18164): GLib-GObject-CRITICAL **: g_object_unref: assertion 
'G_IS_OBJECT (object)' failed

(emacs-24-5:18164): Gtk-WARNING **: Error loading theme icon 'document-new' for 
stock: Icon 'document-new' not present in theme Adwaita

(emacs-24-5:18164): Gtk-WARNING **: Error loading theme icon 'image-missing' 
for stock: Icon 'image-missing' not present in theme Adwaita
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

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