fix kernels_test build

mace/kernels/BUILD

@@ -95,6 +95,7 @@ cc_test(
     linkstatic = 1,
     deps = [
         ":kernels",
+        "//mace/ops",
         "@gtest//:gtest",
         "@gtest//:gtest_main",
     ],
@@ -124,6 +125,7 @@ cc_test(
     linkstatic = 1,
     deps = [
         ":kernels",
+        "//mace/ops",
         "//mace/core:test_benchmark_main",
         "//third_party/eigen3",
     ],