Rename "wl_display" native resource

There is already a "wl_display" resource used by the client-side
Wayland plugin. This is confusing, and would cause horrible bugs
if ever a Wayland server was run as a client (the nested compositor
usecase). Therefore, use "server_wl_display" for the name of the
resource to be used on the server side.

Change-Id: I30455177a154e89b98ad3620b6a14626b821e54c
Reviewed-by: Giulio Camuffo <giulio.camuffo@jollamobile.com>

src/plugins/platforms/eglfs/qeglfsintegration.cpp

@@ -264,7 +264,7 @@ static int resourceType(const QByteArray &key)
         QByteArrayLiteral("eglconfig"),
         QByteArrayLiteral("nativedisplay"),
         QByteArrayLiteral("display"),
-        QByteArrayLiteral("wl_display")
+        QByteArrayLiteral("server_wl_display")
     };
     const QByteArray *end = names + sizeof(names) / sizeof(names[0]);
     const QByteArray *result = std::find(names, end, key);