run-tests: install data files correctly
In 68964567e406 we began installing some data files in PREFIX/share.
When preparing to run the tests, run-tests.py uses --home="" in order
to work around home being set in a ~/.pydistutils.cfg file. This
somehow overwrites the --prefix option.
The result was that the share/ directory was installed in the top of
the Mercurial source tree.
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adding changesets
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.hg/00changelog.i .hg/journal.branch .hg/journal.dirstate .hg/requires .hg/store .hg/store/00changelog.i .hg/store/00changelog.i.a