net: fix ambiguity in EOF handling

`end` MUST always be emitted **before** `close`. However, if a handle
will invoke `uv_close_cb` immediately, or in the same JS tick - `close`
may be emitted first.

PR-URL: https://github.com/nodejs/node/pull/9066


Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ilkka Myller <ilkka.myller@nodefield.com>