tests/readlink.py

run-tests: stop storing start/stop times in a dict by test name

This resolves the last breakage in run-tests that prevented me from
running a single test many times in several threads in parallel. This
will be useful for testing potential fixes to flaky tests.

#!/usr/bin/env python

import errno, os, sys

for f in sys.argv[1:]:
    try:
        print f, '->', os.readlink(f)
    except OSError, err:
        if err.errno != errno.EINVAL:
            raise
        print f, 'not a symlink'

sys.exit(0)