[Security] fix security problem for run_cmd (#61285) (#61398)

* fix security problem for run_cmd

Author: wanghuancoder

python/paddle/utils/cpp_extension/extension_utils.py

@@ -1326,6 +1326,7 @@ def _jit_compile(file_path, verbose=False):
     """
     Build shared library in subprocess
     """
+    assert os.path.exists(file_path)
     ext_dir = os.path.dirname(file_path)
     setup_file = os.path.basename(file_path)