[roll third_party/pigweed] targets/host: Change pw_assert_BACKEND

Change pw_assert_BACKEND to print_and_abort_check_backend, which is
compatible with GoogleTest death tests.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/177835

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 5cd05b6018478ec..38b84d7e926aec5
Roller-URL: https://ci.chromium.org/b/8766133621887736497
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Id98bd22947cdd1054daa1d67191e6ec69dfe77ca
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/kudzu/+/177903
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index 5cd05b6..38b84d7 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 5cd05b6018478ec35681abc7db576a38ad728b90
+Subproject commit 38b84d7e926aec559bd0ba686de87d32f72b0581