[roll third_party/pigweed] pw_compilation_testing: Fix to work with 3.8

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/110631

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 2fb0beee6b469d8..5bc399c5a61f183
Roller-URL: https://ci.chromium.org/b/8802828368065788961
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I66d1de1edaaf32645969be5ef05414091156be8c
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/110711
Commit-Queue: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
Bot-Commit: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index 2fb0bee..5bc399c 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 2fb0beee6b469d8477a00a2fb7b05c3e093d6b2c
+Subproject commit 5bc399c5a61f1830902786bdc549c4d5d878df05