[issue17750] allow the testsuite to run in the installed location

[Serhiy Storchaka]

Changes by Serhiy Storchaka <storchaka at gmail.com>:


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dependencies: +test_compileall fails when run by unprivileged user on installed Python, test_zipfile failure when run by unprivileged user with installed Python

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue17750>
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