[libwnck] Fix srcdir != builddir build

[Colin Walters <walters src gnome org>]

commit f95ef35b214c247e08d699f0a3059368fd020c64
Author: Colin Walters <walters verbum org>
Date:   Thu Sep 1 16:38:29 2011 -0400

    Fix srcdir != builddir build

 libwnck/Makefile.am |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/libwnck/Makefile.am b/libwnck/Makefile.am
index 30860d9..d220ba2 100644
--- a/libwnck/Makefile.am
+++ b/libwnck/Makefile.am
@@ -12,6 +12,7 @@ noinst_PROGRAMS =		\
 AM_CPPFLAGS =					\
 	$(LIBWNCK_CFLAGS)			\
 	-I$(top_srcdir)				\
+	-I$(top_builddir)			\
 	-DWNCK_I_KNOW_THIS_IS_UNSTABLE		\
 	-DWNCK_LOCALEDIR=\"$(wncklocaledir)\"	\
 	$(DISABLE_DEPRECATED_CFLAGS)