tests/test-merge8

inotify: completely ignore events on the repository root

They can only be events on the top directory object. Those events are
meaningless for us: permission changes, repository-wide moves...
And they break the assertion that all events happen in repo/*.
Just ignore them.

Fixes one of the failures of run-test.py --inotify test-permissions

#!/bin/sh

# Test for changeset ba7c74081861
# (update dirstate correctly for non-branchmerge updates)
hg init a
cd a
echo a > a
hg add a
hg commit -m a
cd ..
hg clone a b
cd a
hg mv a b
hg commit -m move
echo b >> b
hg commit -m b
cd ../b
hg pull ../a
hg update