tests/basics: Update array test for big-int with lL typecodes.

tests/basics/array_intbig.py

@@ -1,4 +1,4 @@
-# test array('q') and array('Q')
+# test array types QqLl that require big-ints
 
 try:
     from array import array
@@ -7,6 +7,9 @@ except ImportError:
     print("SKIP")
     sys.exit()
 
+print(array('L', [0, 2**32-1]))
+print(array('l', [-2**31, 0, 2**31-1]))
+
 print(array('q'))
 print(array('Q'))