[cvs-nhc98] Rename old uses of nhc-specific CString to PackedString, t

malcolm: Tue Nov 20 17:46:45 CET 2001 Update of /usr/src/master/nhc/src/prelude/Directory In directory hinken:/tmp/cvs-serv8528/Directory Modified Files: CreateDirectory.hs GetCurrentDirectory.hs RemoveDirectory.hs RemoveFile.hs RenameDirectory.hs SetCurrentDirectory.hs Log Message: Rename old uses of nhc-specific CString to PackedString, to avoid clashes with the new standard type CString.