Make clutter optional for build.

eek/eek-keysym.c

@@ -17,9 +17,18 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  * 02110-1301 USA
  */
+
+/**
+ * SECTION:eek-keysym
+ * @short_description: Keysym conversion utilities
+ */
+
 #include <glib.h>
 #include <stdlib.h>
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif  /* HAVE_CONFIG_H */
 #include "eek-keysym.h"
 
 struct eek_keysym_label {