Rename GHC.StgToCmm.Con -> GHC.StgToCmm.DataCon
Incredibly, Windows disallows the manipulation of any file matching
Con(..*)?. The GHC.StgToCmm.Con
was introduced in the renamings in
447864a9, breaking the Windows build. Work around this by renaming it to
GHC.StgToCmm.DataCon
Fixes #17187 (closed).