File build-fix.patch of Package gnome-build

Index: gnome-build-0.2.0/src/gbf/libgbfmarshal.h
===================================================================
--- gnome-build-0.2.0.orig/src/gbf/libgbfmarshal.h
+++ gnome-build-0.2.0/src/gbf/libgbfmarshal.h
@@ -7,7 +7,7 @@
 G_BEGIN_DECLS
 
 /* VOID:STRING,INT (./libgbfmarshal.list:1) */
-extern void gbf_marshal_VOID__STRING_INT (GClosure     *closure,
+void gbf_marshal_VOID__STRING_INT (GClosure     *closure,
                                           GValue       *return_value,
                                           guint         n_param_values,
                                           const GValue *param_values,