[gnome-themes-standard] Keep installing a gtk-3.0/gtk.css file

[Matthias Clasen <matthiasc src gnome org>]

commit 071bb551ee6781e4eb3270cd007fd7a5ee90f3d6
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Jul 21 13:57:43 2014 -0400

    Keep installing a gtk-3.0/gtk.css file
    
    Tweak UIs such as gnome-tweak-tool and others look for this
    file to determine the presence of themes. Keep installing it
    at least until GTK+ offers an API to list builtin themes.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=733420

 themes/Adwaita/Makefile.am         |    2 +-
 themes/Adwaita/gtk-3.0/Makefile.am |    3 +++
 themes/Adwaita/gtk-3.0/gtk.css     |    1 +
 3 files changed, 5 insertions(+), 1 deletions(-)
---
diff --git a/themes/Adwaita/Makefile.am b/themes/Adwaita/Makefile.am
index c06e6e9..3cb1d77 100644
--- a/themes/Adwaita/Makefile.am
+++ b/themes/Adwaita/Makefile.am
@@ -1,4 +1,4 @@
-SUBDIRS = backgrounds metacity-1
+SUBDIRS = backgrounds metacity-1 gtk-3.0
 
 if GTK2_ENGINE
 SUBDIRS += gtk-2.0
diff --git a/themes/Adwaita/gtk-3.0/Makefile.am b/themes/Adwaita/gtk-3.0/Makefile.am
new file mode 100644
index 0000000..263fd98
--- /dev/null
+++ b/themes/Adwaita/gtk-3.0/Makefile.am
@@ -0,0 +1,3 @@
+themedir = $(datadir)/themes/Adwaita/gtk-3.0
+
+theme_DATA = gtk.css
diff --git a/themes/Adwaita/gtk-3.0/gtk.css b/themes/Adwaita/gtk-3.0/gtk.css
new file mode 100644
index 0000000..b7edf20
--- /dev/null
+++ b/themes/Adwaita/gtk-3.0/gtk.css
@@ -0,0 +1 @@
+/* Adwaita is the default theme of GTK+ 3, this file is not used */