Utils: add additional search paths to FileInProjectFinder

This can be used e.g. by profilers that need to match some
on-device path to a local path.

Change-Id: I38e572bfbd7848cfb2e8ba9e275b99bb09692fea
Reviewed-by: Daniel Teske <daniel.teske@theqtcompany.com>
Reviewed-by: Ulf Hermann <ulf.hermann@theqtcompany.com>