swap package:ghc

Apply "sym" to all coercions in a LiftCoEnv
See bBinderSwaOk.
This flag guides the driver in resolving issues about API support on the target platform. If the flag is set, then these things are true:
  • When the target platform supports only an unregisterised API, this backend can be replaced with compilation via C.
  • When the target does not support an unregisterised API, this back end can replace compilation via C.