CB-7636 Allow using --nobuild flag without screaning

https://issues.apache.org/jira/browse/CB-7636

Currently ‘--nobuild’ param requires – screening

So this skips --nobuild flag
λ cordova run wp8 --nobuild --target="dummy"

Whereas the following works correct
λ cordova run wp8 --target="dummy" -- --nobuild

This is inconsistent with other run options (--device, --target, --emulator) which don’t not require screening.