disable ext/openssl/tests/stream_server_reneg_limit.phpt for windows

This is using the openssl binary which, despite it's contained in the
deps, would probably miss all it's environment. It is just prone to
failure and thus is not worth it.
Merge branch 'PHP-5.6'

* PHP-5.6:
  disable ext/openssl/tests/stream_server_reneg_limit.phpt for windows