tests/basics: Add memoryview test for big ints.

tests/basics/memoryview2.py

@@ -12,7 +12,3 @@ print(list(memoryview(array('b', [0x7f, -0x80]))))
 print(list(memoryview(array('B', [0x7f, 0x80, 0x81, 0xff]))))
 print(list(memoryview(array('h', [0x7f00, -0x8000]))))
 print(list(memoryview(array('H', [0x7f00, 0x8000, 0x8100, 0xffff]))))
-
-# these constructors give an internal overflow in uPy
-#print(list(memoryview(array('i', [0x7f000000, -0x80000000]))))
-#print(list(memoryview(array('I', [0x7f000000, 0x80000000, 0x81000000, 0xffffffff]))))

tests/basics/memoryview_intbig.py

+# test memoryview accessing maximum values for signed/unsigned elements
+try:
+    from array import array
+    memoryview
+except:
+    import sys
+    print("SKIP")
+    sys.exit()
+
+print(list(memoryview(array('i', [0x7f000000, -0x80000000]))))
+print(list(memoryview(array('I', [0x7f000000, 0x80000000, 0x81000000, 0xffffffff]))))