Initialize objects metadata for VM space

[qinsoon]

This is the code about how to identify each object in a sys image: https://github.com/JuliaLang/julia/blob/582585bfb0a5494d41fd28b47a9774d498c608d9/src/staticdata.c#L2237

If we can identify each object, we dont need to bulk set VO bit and log bit, which is a bit hacky.