Add test case for k_bin_bcast_unravel in CUDA backend

Author: ORippler

tests/test-backend-ops.cpp

@@ -6039,6 +6039,9 @@ static std::vector<std::unique_ptr<test_case>> make_test_cases_eval() {
         add_test_bin_bcast(type, {10, 5, 4, 3}, {1, 2, 2, 2});
         add_test_bin_bcast(type, {10, 5, 4, 3}, {2, 2, 2, 2});
 
+        // test case for k_bin_bcast_unravel in CUDA backend
+        add_test_bin_bcast(type, {1, 1, 65536, 1}, {256, 1, 1, 1});
+
         // stable diffusion
         add_test_bin_bcast(type, {1280, 1, 1, 1}, {1, 1, 1, 1});
         add_test_bin_bcast(type, {1280, 1, 1, 1}, {1, 16, 16, 1});