Rename array test to array1 so it doesn't clash with array module.

On my machine, 'import array' in CPython tries to load the array test.

tests/basics/array1.py

@@ -0,0 +1,13 @@
+import array
+
+a = array.array('B', [1, 2, 3])
+print(a, len(a))
+i = array.array('I', [1, 2, 3])
+print(i, len(i))
+print(a[0])
+print(i[-1])
+
+# Empty arrays
+print(len(array.array('h')))
+print(array.array('i'))
+