Unbreak indexer, follow up to #15064

Author: jonathanmetzman

infra/helper.py

@@ -1624,8 +1624,8 @@ def index(args):
     run_args.extend(args.docker_arg)
 
   if args.dev:
-    indexer_dir = os.path.join(common_utils.OSS_FUZZ_DIR,
-                               'infra/base-images/base-builder/indexer')
+    indexer_dir = os.path.join(os.path.dirname(__file__),
+                               'base-images', 'base-builder', 'indexer')
     indexer_binary_path = os.path.join(indexer_dir, 'indexer')
     if not os.path.exists(indexer_binary_path):
       print('Indexer binary does not exist, pulling prebuilt.')