[SAOC 25] improve importC weekly update 11

[Emmanuel]

Hi everyone,

This week, I tackled typedef little issues with type ids that are 
D keywords.

I saw an issue opened

typedef unsigned int uint; After being aliased into D, it becomes

alias uint = uint;

That’s an invalid alias as uint is a D keyword. So initially I 
had designed a little fix to handle it for typedefs. But I have 
also noted that this issue goes beyond typedefs and must be 
handled for all other identifiers that are D keywords. If you 
want to use them from D, you’ll have to use them with _ appended.

So a typical one with alias becomes

alias uint_ = uint;

This will be loudly announced in docs and mentioned to the whole 
D community!