scriptListCount should get initialized by scriptList variable

Sorry about that. My compiler (gcc 4.0) doesn't notice on a 32bit build.

Thanks go to Maciej Rumianowski for pointing this out.

No need for the OLDNAMESLIB, we already had gb_Library_win32_OLDNAMES
for this purpose.

Also removed the ability to use alternatives for rscpp and rsc2.
Contributed under license LGPLv3+/MPL.

Add some trivialish first attempts at iOS-specific headers and some
source files that surely are quite bogus and does nothing sane, but
must start with something. Mostly based on the MacOSX ("aqua") code.

They are not included in the SDK either.

Header names are all lower-case. Use our own sehandler.hxx instead of
assuming that stuff being in a patches excpt.h.