Fix a CI bug due to different convention (no ./) for referencing fi…

…les.

Signed-off-by: Daira-Emma Hopwood <[email protected]>

util/find-orphaned-files.sh

@@ -30,7 +30,7 @@ function main
 
 function parse-linked-files
 {
-  grep '(' | sed 's/^.*(//; s/)$//' | grep -v '^$' | sort
+  grep '(' | sed 's@^.*(@./@; s@)$@@' | grep -v '^$' | sort
 }
 
 function find-actual-files