message: Put merge_by_key tests into CMakeLists
diff: @@ -84,6 +84,7 @@ add_hipthrust_test("thrust.hip.inner_product" test_inner_product.cpp)
  add_hipthrust_test("thrust.hip.max_element" test_max_element.cpp)
  add_hipthrust_test("thrust.hip.memory" test_memory.cpp)
  add_hipthrust_test("thrust.hip.merge" test_merge.cpp)
  +add_hipthrust_test("thrust.hip.merge_by_key" test_merge_by_key.cpp)
  add_hipthrust_test("thrust.hip.min_element" test_min_element.cpp)
  add_hipthrust_test("thrust.hip.minmax_element" test_minmax_element.cpp)
  add_hipthrust_test("thrust.hip.mismatch" test_mismatch.cpp)
  