Generate pbconfig.h in generate_descriptor_proto.sh

generate_descriptor_proto.sh

@@ -27,6 +27,7 @@ __EOF__
 fi
 
 cd src
+make $@ google/protobuf/stubs/pbconfig.h
 CORE_PROTO_IS_CORRECT=0
 while [ $CORE_PROTO_IS_CORRECT -ne 1 ]
 do