dirstate: explicitly write the dirstate after `eol` dirstate manipulation

I am working on making the dirstate write patterns more predictable. This patch is
part of a small series of similar patches that adds a explicit dirstate write in
a handful of location where the dirstate is updated "a bit in a strange way".

With this explicit write, we are no longer relying on implicite write of the
dirstate on `wlock` release. This make the world a better place.

hgext/eol.py

@@ -445,6 +445,7 b' def reposetup(ui, repo):'
                     # Write the cache to update mtime and cache .hgeol
                     with self.vfs(b"eol.cache", b"w") as f:
                         f.write(hgeoldata)
+                    self.dirstate.write(self.currenttransaction())
                 except errormod.LockUnavailable:
                     # If we cannot lock the repository and clear the
                     # dirstate, then a commit might not see all files