Getaddrinfo fail timeout

On my machine `getaddrinfo_fail` consistently times out:

<pre>
=============================================================
&#91;%  61|+ 125|-   0|T   0|S   0]: getaddrinfo_fail
`getaddrinfo_fail` failed: timeout
Output from process `getaddrinfo_fail`: (no output)
=============================================================
&#91;% 100|+ 203|-   1|T   0|S   0]: Done.
FAIL: test/run-tests
</pre>

Tracing through the call stack showed that `getaddrinfo` was taking just a bit longer than the 5 second timeout to give up on the fake hostname:

<pre>
$ test/run-tests getaddrinfo_fail getaddrinfo_fail
getaddrinfo_fail start:     1391183554.344
uv_getaddrinfo start:       1391183554.344
uv_getaddrinfo end:         1391183554.344
uv__getaddrinfo_work start: 1391183554.344
<b>getaddrinfo start:          1391183554.344</b>
uv__io_poll start:          1391183554.344
uv__epoll_wait start:       1391183554.344
<b>getaddrinfo end:            1391183559.457</b>
uv__getaddrinfo_work end:   1391183559.457
uv__epoll_wait end:         1391183559.457
uv__async_io start:         1391183559.457
uv__async_event start:      1391183559.457
uv__work_done start:        1391183559.457
uv__getaddrinfo_done start: 1391183559.457
uv__getaddrinfo_done end:   1391183559.457
getaddrinfo_fail_cb start:  1391183559.457
getaddrinfo_fail_cb end:    1391183559.457
uv__work_done end:          1391183559.457
uv__async_event end:        1391183559.457
getaddrinfo_fail end:       1391183559.457
</pre>

In this patch I've upped the timeout to 10000 to compensate.  I've also modified the test harness to support setting timeouts on a per-test basis (e.g. *only* getaddrinfo_fail has a 10000 timeout, the other tests remain at the default).

I worked my way through the contribution guidelines, so hopefully everything is in order.  Let me know if there's anything I missed.

Thank you!