Update mac_unopt.json

ci/builders/mac_unopt.json

@@ -17,14 +17,15 @@
                 "ci/host_debug_tests",
                 "--runtime-mode",
                 "debug",
+                "--mac-cpu",
+                "arm64",
                 "--no-lto",
                 "--prebuilt-dart-sdk",
                 "--build-embedder-examples",
                 "--use-glfw-swiftshader",
                 "--rbe",
                 "--no-goma",
                 "--xcode-symlinks"
-
             ],
             "name": "ci/host_debug_tests",
             "description": "Produces debug mode arm64 macOS host-side tooling and builds host-side unit tests for arm64 macOS.",
@@ -69,6 +70,8 @@
                 "ci/host_profile_tests",
                 "--runtime-mode",
                 "profile",
+                "--mac-cpu",
+                "arm64",
                 "--no-lto",
                 "--prebuilt-dart-sdk",
                 "--build-embedder-examples",
@@ -119,6 +122,8 @@
                 "ci/host_release_tests",
                 "--runtime-mode",
                 "release",
+                "--mac-cpu",
+                "arm64",
                 "--no-lto",
                 "--prebuilt-dart-sdk",
                 "--build-embedder-examples",
@@ -227,6 +232,8 @@
                 "ci/host_debug_unopt",
                 "--runtime-mode",
                 "debug",
+                "--mac-cpu",
+                "arm64",
                 "--unoptimized",
                 "--no-lto",
                 "--prebuilt-dart-sdk",