libwebsockets: add libressl patch

srcpkgs/libwebsockets/patches/fix-libressl.diff

@@ -0,0 +1,18 @@
+diff --git a/lib/ssl.c b/lib/ssl.c
+index ac3ad2e..88906e7 100644
+--- lib/ssl.c
++++ lib/ssl.c
+@@ -339,13 +339,6 @@ lws_context_init_server_ssl(struct lws_context_creation_info *info,
+ 		if (lws_context_ssl_init_ecdh(context))
+ 			return 1;
+ 
+-#if OPENSSL_VERSION_NUMBER >= 0x10200000L
+-		n = SSL_CTX_build_cert_chain((SSL_CTX *)user,
+-					     SSL_BUILD_CHAIN_FLAG_CHECK |
+-					     SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR);
+-		lwsl_notice("%s: build cert chain %d", __func__, n);
+-#endif
+-
+ 		/*
+ 		 * SSL is happy and has a cert it's content with
+ 		 * If we're supporting HTTP2, initialize that