Added a stripModifiers() function to remove shared|const|immutable storage classes in D2 (should eventually be moved to a dhelpers file rather than llvm helpers). Replaced a few occurances of STCinvariant with STCimmutable.

module moduleinfo2;

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

void main()
{
    printf("listing modules:\n");
    foreach(m; ModuleInfo)
    {
        printf("  %.*s\n", m.name.length, m.name.ptr);
    }
}