File webkitextern.patch of Package webkitgtk2

diff --git a/Source/WebKit/gtk/GNUmakefile.am b/Source/WebKit/gtk/GNUmakefile.am
index 5502f25..d03c2bd 100644
--- a/Source/WebKit/gtk/GNUmakefile.am
+++ b/Source/WebKit/gtk/GNUmakefile.am
@@ -352,9 +352,9 @@ $(GENSOURCES_WEBKIT)/webkitmarshal.h: stamp-webkitmarshal.h
 	@true
 
 stamp-webkitmarshal.cpp: $(WEBKIT_MARSHAL_LIST)
-	$(AM_V_GEN) echo "extern \"C\" {" > $(GENSOURCES_WEBKIT)/webkitmarshal.cpp && \
-	$(GLIB_GENMARSHAL) --prefix=webkit_marshal $(WEBKIT_MARSHAL_LIST) --body >> $(GENSOURCES_WEBKIT)/webkitmarshal.cpp && \
+	$(AM_V_GEN)$(GLIB_GENMARSHAL) --prefix=webkit_marshal $(WEBKIT_MARSHAL_LIST) --body > $(GENSOURCES_WEBKIT)/webkitmarshal.cpp && \
 	echo '}' >> $(GENSOURCES_WEBKIT)/webkitmarshal.cpp && \
+	sed -i "3i extern \"C\" {" $(GENSOURCES_WEBKIT)/webkitmarshal.cpp && \
 	echo timestamp > $(@F)
 
 stamp-webkitmarshal.h: $(WEBKIT_MARSHAL_LIST)