Modules with create:true should generate a stub when added to stubModules

[rjgotten]

If create:true is specified for a module and the module is build-time generated, then it will currently not have a define('<module id>', {}) stub generated when said module's id is also present in the stubModules array.

Having build-time generated modules contain a define call may be necessary to properly support scenarios where enforceDefine:true is used. I've run into atleast one case where this was indeed a necessity and quickly found out that it was a pain to set up the build script to generate these define calls in another way.