add arm64 to the accepted list of platforms

Author: lewurm

graalpython/lib-python/3/test/test_platform.py

@@ -217,7 +217,7 @@ def test_mac_ver(self):
             self.assertEqual(res[1], ('', '', ''))
 
             if sys.byteorder == 'little':
-                self.assertIn(res[2], ('i386', 'x86_64'))
+                self.assertIn(res[2], ('i386', 'x86_64', 'arm64'))
             else:
                 self.assertEqual(res[2], 'PowerPC')