[third_party/pigweed] Roll 2 commits

2ace3eed115d834 pw_watch: Build directory exclude list handling
ab20a82a5f88c51 pw_hdlc: Follow new module docs guidelines

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 36bf818849b69be..2ace3eed115d834
Roller-URL: https://ci.chromium.org/b/8761110507045375745
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I0b2e07c1d2c7449e1ad2b3ab6c6c4de0c2ed3020
Reviewed-on: https://pigweed-review.googlesource.com/c/gonk/+/185775
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 36bf818..2ace3ee 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 36bf818849b69becd0755c98012bb85f2f3ee9fc
+Subproject commit 2ace3eed115d834191f94f82453878c324de9f33