Updated runtest to always rebuild libtangobos-partial.a in case of updates. Changed std.stdarg to import ldc.vararg so it has the correct implementation.

extern(C) void gc_collect();

class C
{
  int i = 42;
}

C data;

void main()
{
  data = new C;
  gc_collect();
  assert(data.i == 42);
}