Fix VarDecls for tuples. Closes #99. I've implemented it this way since it doesn't require any changes in the frontend. However, I think having TypeTuple expressed as LLVM struct types would make much more sense and open the door to tuple lvalues.

module tangotests.lazy1;

extern(C) int printf(char*, ...);

void main()
{
    lazystr("whee\n");
}

void lazystr(lazy char[] msg)
{
    printf("%.*s", msg.length, msg.ptr);
}