Tests: handled SIGPIPE in ssl_sni_reneg.t.

The handler was missed in f50c7d90f5c9.

ssl_sni_reneg.t

diff --git a/ssl_sni_reneg.t b/ssl_sni_reneg.t
index 8036d6f..3b516c8 100644
--- a/ssl_sni_reneg.t
+++ b/ssl_sni_reneg.t
@@ -132,6 +132,8 @@
 SKIP: {
 skip 'connection failed', 3 unless $s;
 
+local $SIG{PIPE} = 'IGNORE';
+
 Net::SSLeay::write($ssl, 'GET / HTTP/1.0' . CRLF);
 
 ok(Net::SSLeay::renegotiate($ssl), 'renegotiation');