dirstate: don't remove normallookup files from nonnormalset The dirstate typically tries to keep the nonnormalset and otherparentset up-to-date when making changes to the dirstate. In the case of files marked normallookup, however, it erroneously removes the file from the nonnormalset, after _addpath had just added it. This doesn't seem to matter at the moment, as nothing relies on the nonnormalset being correct at this point, however a future re-implementations of the dirstate map will require this to be kept up-to-date correctly. Differential Revision: https://phab.mercurial-scm.org/D1339