Fix test failures in releasetools

new_path used before assignment, use `path` instead.

Bug: 280425458
Change-Id: I55086f92cf109af67032614cefde60e6478bb149
diff --git a/tools/releasetools/common.py b/tools/releasetools/common.py
index 1f021e0..732b5e9 100644
--- a/tools/releasetools/common.py
+++ b/tools/releasetools/common.py
@@ -1429,7 +1429,7 @@
       if os.path.exists(new_path):
         return new_path
     raise ExternalError(
-        "Failed to find {}".format(new_path))
+        "Failed to find {}".format(path))
 
   if not split_args:
     return split_args