change dir resolver to include virtual path (#2259)

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

syft/internal/fileresolver/unindexed_directory.go

@@ -261,13 +261,14 @@ func (u UnindexedDirectory) Write(location file.Location, reader io.Reader) erro
 func (u UnindexedDirectory) newLocation(filePath string, resolveLinks bool) *file.Location {
 	filePath = path.Clean(filePath)
 
-	virtualPath := ""
+	virtualPath := filePath
 	realPath := filePath
 
 	if resolveLinks {
 		paths := u.resolveLinks(filePath)
 		if len(paths) > 1 {
 			realPath = paths[len(paths)-1]
+			// TODO: this is not quite correct, as the equivalent of os.EvalSymlinks needs to be done (in the context of afero)
 			if realPath != path.Clean(filePath) {
 				virtualPath = paths[0]
 			}