[gtkglext] libgdkgl needs to link with libGLU (for now).

[Braden McDaniel <bradenmcd src gnome org>]

commit 1daecf65e9248a1d193b7e11338a22d803666de2
Author: Braden McDaniel <braden bolt endoframe net>
Date:   Wed Dec 23 15:01:38 2009 -0500

    libgdkgl needs to link with libGLU (for now).

 gdk/Makefile.am |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gdk/Makefile.am b/gdk/Makefile.am
index 28ade8e..45caa9c 100644
--- a/gdk/Makefile.am
+++ b/gdk/Makefile.am
@@ -55,7 +55,7 @@ common_ldflags = \
 	$(gdkglext_win32_symbols)
 
 common_libadd = \
-	$(GDK_LIBS) $(GL_LIBS) $(GDKGLEXT_WIN_LIBS)
+	$(GDK_LIBS) $(GLU_LIBS) $(GDKGLEXT_WIN_LIBS)
 
 #
 # setup source file variables