AUTOMOC: Provide a option to allow AUTOMOC to compile individual moc_x.cxx instead of including all in mocs_compilation.cxx
mocs_compilation.cxx including all mocs and all headers is including recursively, but some headers must be included in restrict order , or can't being included in same translation unit, mocs_compilation.cxx build will fail. provide a option to allow mocs compiled individually will be helpful.