In PDB debug information, compiland's pathname is stored twice:
- both refer to the same file, but with variations in path handling
  (eg: one could be foo1\foo2\bar.obj and the other
   foo1\deadbeef\..\foo2\bar.obj)

Use same pathname string as native when storing compiland's pathname
(it eases comparison of dumps between the two).
Signed-off-by: Eric Pouech <eric.pouech@gmail.com>