Make `cpdef func() nogil` work with CyFunctions by excluding the Python...

Make `cpdef func() nogil` work with CyFunctions by excluding the Python function creation from the 'nogil' check.

Cython/Compiler/Nodes.py

@@ -2295,7 +2295,7 @@ class CFuncDefNode(FuncDefNode):
     #  is_c_class_method whether this is a cclass method
 
     child_attrs = ["base_type", "declarator", "body", "py_func_stat", "decorators"]
-    outer_attrs = ["decorators"]
+    outer_attrs = ["decorators", "py_func_stat"]
 
     inline_in_pxd = False
     decorators = None

tests/run/cpdef_nogil.pyx

+# cython: binding=True
+# mode: run
+# tag: cyfunction
+
+cpdef int simple() nogil:
+    """
+    >>> simple()
+    1
+    """
+    return 1
+
+
+cpdef int call_nogil():
+    """
+    >>> call_nogil()
+    1
+    """
+    with nogil:
+        return simple()