Resolve relative PDB paths

[Systemcluster]

In some cases the PDB path returned from pe_file.pdb_info() is relative and includes only the filename of the PDB. This results in the existence check to fail:

blondie/src/lib.rs

Lines 659 to 660 in aefddb0

	let pdb_path = PathBuf::from(pdb_path);
	if pdb_path.exists() {

We can check if the path is relative and join it with the path of the image in that case.

Fixes #65
Fixes flamegraph-rs/flamegraph#277

[nico-abram]

Thanks! Ill see if I can publish a version with this fix later

[nico-abram]

Published 0.4.2 (Minor version bump) with these changes @Systemcluster . My (possibly mistaken) understanding from how flamegraph-rs depends on blondie is that any new release of it should get the change.

[Systemcluster]

Thanks! I reinstalled flamegraph and it pulled the latest version. 👍