tests/basics: Add test for getting name of func with closed over locals.

Tests correct decoding of the prelude to get the function name.

tests/basics/fun_name.py

@@ -22,3 +22,11 @@ try:
     str((1).to_bytes.__name__)
 except AttributeError:
     pass
+
+# name of a function that has closed over variables
+def outer():
+    x = 1
+    def inner():
+        return x
+    return inner
+print(outer.__name__)