[gtk+] wayland: Link against librt

[Matthias Clasen <matthiasc src gnome org>]

commit a12ee84ec3466e2f4262d0bd484ef93f766a6545
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun Aug 7 16:11:55 2016 -0400

    wayland: Link against librt
    
    This is required for shm_open.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=769603

 gdk/wayland/Makefile.am |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gdk/wayland/Makefile.am b/gdk/wayland/Makefile.am
index fdadb24..e6950bf 100644
--- a/gdk/wayland/Makefile.am
+++ b/gdk/wayland/Makefile.am
@@ -15,7 +15,7 @@ AM_CPPFLAGS =                                 \
        $(GTK_DEBUG_FLAGS)                      \
        $(GDK_DEP_CFLAGS)
 
-LDADDS = $(GDK_DEP_LIBS)
+LDADDS = $(GDK_DEP_LIBS) $(SHM_LIBS)
 
 noinst_LTLIBRARIES =                           \
        libgdk-wayland.la