[third_party/pigweed] Roll 2 commits

6942dd5c53c11b4 pw_format: Refactor format string parsing for bett
2d4292592c08ffd *: Run clang-format

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: ef655533be05a36..6942dd5c53c11b4
Roller-URL: https://ci.chromium.org/b/8748564567040099249
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Ib9f94b93c7534f20e5683a6a4814033a86931008
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/208872
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index ef65553..6942dd5 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit ef655533be05a3681fdc4038041d56a55c9961c6
+Subproject commit 6942dd5c53c11b400d08ad89e6e11d225cc9776e