bazel: Set check backend explicitly

Bug: 350585010
Change-Id: Iebbc3324d106e774a39650e2602f8db86fb2c65c
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/219672
Presubmit-Verified: CQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com>
Commit-Queue: Auto-Submit <auto-submit@pigweed-service-accounts.iam.gserviceaccount.com>
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
Reviewed-by: Taylor Cramer <cramertj@google.com>
Pigweed-Auto-Submit: Ted Pudlik <tpudlik@google.com>
diff --git a/targets/transition.bzl b/targets/transition.bzl
index 9b81962..355d26d 100644
--- a/targets/transition.bzl
+++ b/targets/transition.bzl
@@ -28,6 +28,8 @@
     "@hal_driver//:hal_config": "@pigweed//targets/stm32f429i_disc1_stm32cube:hal_config",
     "@pigweed//pw_assert:backend": "@pigweed//pw_assert_basic",
     "@pigweed//pw_assert:backend_impl": "@pigweed//pw_assert_basic:impl",
+    "@pigweed//pw_assert:check_backend": "@pigweed//pw_assert_basic",
+    "@pigweed//pw_assert:check_backend_impl": "@pigweed//pw_assert_basic:impl",
     "@pigweed//pw_boot:backend": "@pigweed//pw_boot_cortex_m",
     "@pigweed//pw_interrupt:backend": "@pigweed//pw_interrupt_cortex_m:context",
     "@pigweed//pw_log:backend": "@pigweed//pw_log_tokenized",