Update to real-time linux wiki

[Lukas Bulwahn <lukas.bulwahn@xxxxxxxxx>]

Dear all,

just a quick update, I added a reference to the recent LWN.net article on 
the real-time future in the Real-time Linux wiki:

  https://wiki.linuxfoundation.org/realtime/rtl/blog#lwnnetpreparing_for_the_realtime_future


Best regards,

Lukas