[gnome-themes-standard] Revert "don't include themes/Adwaita/gtk-2.0 as a subdir"

[Jakub Steiner <jimmac src gnome org>]

commit 8a9048ecded43dfdb54742d5ad1e43079ff5bc87
Author: Jakub Steiner <jimmac gmail com>
Date:   Wed Nov 26 17:24:19 2014 +0100

    Revert "don't include themes/Adwaita/gtk-2.0 as a subdir"
    
    This reverts commit 916d868dc95639c772a32a693546bb3e4e138fa4.

 themes/Adwaita/Makefile.am |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/themes/Adwaita/Makefile.am b/themes/Adwaita/Makefile.am
index eec4514..a0eb9a9 100644
--- a/themes/Adwaita/Makefile.am
+++ b/themes/Adwaita/Makefile.am
@@ -1,5 +1,9 @@
 SUBDIRS = metacity-1 gtk-3.0
 
+if GTK2_ENGINE
+SUBDIRS += gtk-2.0
+endif
+
 THEME_NAME=Adwaita
 THEME_IN_FILES=index.theme.in