Support for PE -> PDB lookup about locate-dwarf

[luser]

The original intention was to have support for cross-platform debug info, but yeah, the current crate name is unfortunate in that respect. :)

[dvc94ch]

I guess that fits within the scope of this crate.

[schultetwin1]

I created gimli-rs/object#298 in order to support this functionality. Once that PR is completed and makes it into the next release, the object crate will have the ability to read pdb_info() which we can use to get the path to the PDB.

[schultetwin1]

That PR was completed. Once object has a new release I'll do this work to add PDB searching. It should be pretty easy.