[gnome-flashback] modulesets, 3.28: add libwnck

[Alberts Muktupāvels <muktupavels src gnome org>]

commit bea243275de1b852471f3a87f589bfcc607f9d27
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Mon Dec 4 16:58:53 2017 +0200

    modulesets, 3.28: add libwnck
    
    It was removed from gnome-suites-core-deps-3.28.modules:
    https://git.gnome.org/browse/jhbuild/commit/?id=c7a7be34b2a9783f22a7cb33f97f66dab1b9fa2b

 modulesets/gnome-flashback-3.28.modules |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)
---
diff --git a/modulesets/gnome-flashback-3.28.modules b/modulesets/gnome-flashback-3.28.modules
index ad5c832..84b5fb7 100644
--- a/modulesets/gnome-flashback-3.28.modules
+++ b/modulesets/gnome-flashback-3.28.modules
@@ -133,6 +133,14 @@
     </dependencies>
   </autotools>
 
+  <autotools id="libwnck">
+    <branch />
+    <dependencies>
+      <dep package="gtk+-3" />
+      <dep package="startup-notification" />
+    </dependencies>
+  </autotools>
+
   <autotools id="metacity">
     <branch />
     <dependencies>