tests/test-paths

dirstate: fix in memory dirstate entries for 1-second race

Only the on-disk file was modified, we need to modify the in-memory dirstate
as well.

#!/bin/sh
hg init a
hg clone a b
cd a
echo '[paths]' >> .hg/hgrc
echo 'dupe = ../b' >> .hg/hgrc
hg in dupe | fgrep '../'
cd ..
hg -R a in dupe | fgrep '../'
true