Test -flatstaticmethod and %extend

Examples/test-suite/python/python_flatstaticmethod_runme.py

@@ -83,3 +83,10 @@ if A.defargs(1) != 21:
 
 if A.defargs(1, 2) != 3:
     raise RuntimeError
+
+# %extend
+if A_staticextended(11) != 11:
+    raise RuntimeError
+
+if A.staticextended(11) != 11:
+    raise RuntimeError

Examples/test-suite/python_flatstaticmethod.i

@@ -11,6 +11,10 @@
 %typemap(in) (int c, int d) "$1 = 0; $2 = 0;";
 %typemap(doc,name="hello",type="Tuple") (int c, int d) "hello: int tuple[2]";
 
+%extend A {
+static int staticextended(int i) { return i; }
+}
+
 %inline %{
   struct A {
     static int bar(int a) {