Noted initially here: #24343 and I ended up just reproducing this locally.

Steps to reproduce:

1. Follow Add2App instructions to create an Add2App project
2. Change from simulator to device deployment

This ends up with an ENABLE_BITCODE = YES configuration, which fails to build. Manual resolution is to set this to NO and you're good again, but maybe we can find a way to get this in the config files properly. I suspect adding it to Generated.xcconfig will solve things.