Added stub for user module (#1454)

stdlib/2/user.pyi

@@ -0,0 +1,9 @@
+# Stubs for user (Python 2)
+
+# Docs: https://docs.python.org/2/library/user.html
+# Source: https://hg.python.org/cpython/file/2.7/Lib/user.py
+from typing import Any
+
+def __getattr__(name) -> Any: ...  # type: ignore
+home: str
+pythonrc: str