Unity: Set SKIP_AUTOMOC property to ON for included source files
The unity source files will include the regular source files and will be processed by AUTOMOC.
The already included source files do not need AUTOMOC to process them.
Fixes: #21604
The unity source files will include the regular source files and will be processed by AUTOMOC.
The already included source files do not need AUTOMOC to process them.
Fixes: #21604