Restore the trailing newline PR #6 dropped from evals.json

Every other JSON file in the tree ends with a newline; the hardware pass
removed this one, so the file diffed as 'no newline at end of file'. Content
unchanged -- the eval entry it adds (id 4, the hardware-layer route) parses.

skills/apk-reverse/evals/evals.json

@@ -66,4 +66,4 @@
       "_targets_reference": "references/hardware-watchpoints.md, references/kernel-event-injection.md"
     }
   ]
-}
+}