Fix the in-scope set for extendTvSubstWithClone
Fix the in-scope set for extendTvSubstWithClone

We'd forgotten the variables free in the kind.

Ditto extendCvSubstWithClone

(cherry picked from commit 15fc52819c440f9e9b91ce92fcfda3c264cbe1c1)

GaloisInc/halvm-ghc,GaloisInc/halvm-ghc,GaloisInc/halvm-ghc,GaloisInc/halvm-ghc,GaloisInc/halvm-ghc,GaloisInc/halvm-ghc,GaloisInc/halvm-ghc