Summary:
Refactoring the codegen buck target from being used just for testing to a way that can be depended on for the real fabric target to replace the existing component code.
After this change, we can build a target for react native to use the codegen to create the native files for Switch. A follow up diff will be necessary to hook this up and actually replace the native files for switch.
Reviewed By: mdvacca
Differential Revision: D13662363
fbshipit-source-id: 599dd9ed9ca24ffb5c5784396f4bee7457d94d6d