Update net/third_party/nss to NSS 3.15.4.

net/third_party/nss/patches/sslsock_903565.patch

Index: net/third_party/nss/patches/sslsock_903565.patch
===================================================================
--- net/third_party/nss/patches/sslsock_903565.patch	(revision 242942)
+++ net/third_party/nss/patches/sslsock_903565.patch	(working copy)
@@ -1,20 +0,0 @@
-diff --git a/net/third_party/nss/ssl/sslsock.c b/net/third_party/nss/ssl/sslsock.c
-index fd71aee..db0da5f 100644
---- a/net/third_party/nss/ssl/sslsock.c
-+++ b/net/third_party/nss/ssl/sslsock.c
-@@ -3057,6 +3057,7 @@ ssl_NewSocket(PRBool makeLocks, SSLProtocolVariant protocolVariant)
- 	ss->opt.useSocks       = PR_FALSE;
- 	ss->opt.noLocks        = !makeLocks;
- 	ss->vrange             = *VERSIONS_DEFAULTS(protocolVariant);
-+	ss->protocolVariant    = protocolVariant;
- 
- 	ss->peerID             = NULL;
- 	ss->rTimeout	       = PR_INTERVAL_NO_TIMEOUT;
-@@ -3117,7 +3118,6 @@ loser:
- 	    PORT_Free(ss);
- 	    ss = NULL;
- 	}
--	ss->protocolVariant = protocolVariant;
-     }
-     return ss;
- }