[SDL] S60 SDL update and C2Doom as well

[Sam Lantinga]

Make it so, I had already heard from Hannu when I was working on SDL 1.3:
"Markus Mertama has rewrited SDL port for newer Symbian OS devices. I forward
this to him as I hope :-) he is interested to make a release for your SDL
baseline.

There is no point to update my old Nokia 9210 version, as those devices are
hardly not used any more."

See ya,
	-Sam Lantinga, Lead Software Engineer, Blizzard Entertainment