LDC predefined identifiers

[Brad Roberts]

bearophile wrote:
> Brad Roberts:
>> I'm not particularly excited about the way this looks, but take a peek:<
> 
> I can see names like:
> 
> LDC
> LLVM
> LLVM64
> Win64
> Win32
> Windows
> D_Version2
> 
> =>
> 
> They may become more orthogonal, and there's no need to keep both LDC and LLVM:
> 
> Bit_64
> Bit_32
> Windows
> Linux
> Compiler_LDC
> Compiler_DMD
> Compiler_GDC
> Stdlib_Phobos
> Stdlib_Tango
> D_Version_1
> D_Version_2
> And some more.
> 
> Bye,
> bearophile

My goal wasn't to start a complete overhaul of the identifiers.  That'd cause
way more grief than just creating the list for only a small amount of gain.

Later,
Brad