Tests: unbreak $ssl_ciphers test with BoringSSL.

SSL_get_shared_ciphers() is a stub there.

ssl.t

diff --git a/ssl.t b/ssl.t
index 46ab78d..4fcb43e 100644
--- a/ssl.t
+++ b/ssl.t
@@ -247,7 +247,8 @@
 like(get('/id', 8085), qr/^body \w{64}$/m, 'session id');
 unlike(http_get('/id'), qr/body \w/, 'session id no ssl');
 like(get('/cipher', 8085), qr/^body [\w-]+$/m, 'cipher');
-like(get('/ciphers', 8084), qr/^body [:\w-]+$/m, 'ciphers');
+my $re = $t->has_module('BoringSSL') ? '' : qr/[:\w-]+/;
+like(get('/ciphers', 8084), qr/^body $re$/m, 'ciphers');
 like(get('/client_verify', 8085), qr/^body NONE$/m, 'client verify');
 like(get('/protocol', 8085), qr/^body (TLS|SSL)v(\d|\.)+$/m, 'protocol');
 like(cert('/issuer', 8085), qr!^body CN=issuer:/CN=issuer$!m, 'issuer');