Add new llvm-gcc 2336.* patch

340-allow-more-llvm-configs.patch
 Allows Debug+Asserts plus Release+Asserts builds
 of llvm to be used when building llvm-gcc

Also port the llvm-gcc 2336 patch-set from 2336.1
to 2336.11

And fix llvm-gcc 2339.* prompts, they should have
said 2336.* instead.

Also reintroduced llvm-gcc in i686-apple-darwin11
sample.