tools: check for refs as one plus signal refs

Co-authored-by: Antoine du Hamel <duhamelantoine1995@gmail.com>

Author: trivikr

tools/eslint-rules/prefer-abort-signal-abort.js

@@ -118,8 +118,7 @@ module.exports = {
             return isAbortReference(reference, abortStatement, name);
           });
 
-          if (references.length !== 2 ||
-              signalReferences.length !== 1 ||
+          if (references.length !== (1 + signalReferences.length) ||
               abortReferences.length !== 1) {
             continue;
           }