Fixed import statements in test_muldiv.py

Author: AzeezIsh

tests/test_muldiv.py

@@ -2,7 +2,7 @@
 
 import numpy as np
 import pytest
-from utility_functions import check_type_supported, get_all_types
+from tests.utility_functions import check_type_supported, get_all_types
 
 import arrayfire_wrapper.dtypes as dtype
 import arrayfire_wrapper.lib as wrapper