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.
#!/bin/sh
echo "[extensions]" >> $HGRCPATH
echo "hgk=" >> $HGRCPATH
hg init repo
cd repo
echo a > a
hg ci -Am adda
hg debug-cat-file commit 0