If a test recipe does something like this:
indir "foo.$$" => sub {
chmod 0500, File::Spec->curdir();
ok(run(app(["something"])));
}
we get a problem, because we were storing the temporary stderr file in
the current directory at all times (so while inside the 'indir', we
would attemp to store it in "foo.$$").
So, change our ways to always store that temporary file in the exact
same location, defined by the environment variable RESULT_D, or
failing that TEST_D, or failing that $TOP/test.
Reviewed-by: Rich Salz <rsalz@openssl.org>
ceffb33db2