[CMake] generic Symbian gcce-toolchain file

[Andreas Pokorny]

Hello,

> So set WIN32 to true and see what happens. If it has bad side effects you
> could also do
> set(SYMBIAN TRUE)
> in the platform file and add that one test in cmTarget.

I am sure it will have bad side effects for us sooner or later. Do we
have to provide
a patch for cmTarget?

Why is this check done inside cmake itself?

kind regards
Andreas Pokorny