largefile: respect the `normal` signature
The `parentfiledata` parameter was missing, we throw it away because I am not sure what to do with it in the largefile case.
Differential Revision: https://phab.mercurial-scm.org/D11154
sparse: use `update_file` instead of `normal` in `refreshwdir`
This is the newer, more semantic API.
Differential Revision: https://phab.mercurial-scm.org/D11152