Fix TlsV1SslV3 case in the WinRT SSL backend

It would previously only enable TLS v1.0, but it should also enable
SSL v3. According to Microsoft's documentation[0] that is exactly what
"SocketProtectionLevel_Ssl" does.

[0]: https://docs.microsoft.com/en-us/uwp/api/windows.networking.sockets.socketprotectionlevel

Change-Id: Id48f1ad310d994b8379116c9fa2102db858d7f69
Reviewed-by: Timur Pocheptsov <timur.pocheptsov@qt.io>

src/network/ssl/qsslsocket_winrt.cpp

@@ -236,9 +236,9 @@ void QSslSocketBackendPrivate::startClientEncryption()
     switch (q->protocol()) {
     case QSsl::AnyProtocol:
     case QSsl::SslV3:
+    case QSsl::TlsV1SslV3:
         protectionLevel = SocketProtectionLevel_Ssl; // Only use this value if weak cipher support is required
         break;
-    case QSsl::TlsV1SslV3:
     case QSsl::TlsV1_0:
         protectionLevel = SocketProtectionLevel_Tls10;
         break;