roll: third_party/pigweed, .bazelversion

third_party/pigweed a78ddd0..cfa4da0 (3 commits)
cfa4da0:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/237932 pw_async2: Fix coroutine CMake+Windows compilation
bcda51c:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/237258 pw_bluetooth_proxy: Prevent flakes by zeroing arrays
8c7b094:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/237954 roll: bazel

.bazelversion
From
    d62e0a0f32188e1875bb8e62ef4377ea4dc1aab2
To
    1ff5af18d045e8f30a2a0367470db4e8225a785c

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: a78ddd06be398f..cfa4da0ff6f50b
Roller-URL: https://ci.chromium.org/b/8735781345769733249
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I57537623324c8890320028e82558035a65908956
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/237906
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
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/.bazelversion b/.bazelversion
index 53031b1..41b382c 100644
--- a/.bazelversion
+++ b/.bazelversion
@@ -1 +1 @@
-d62e0a0f32188e1875bb8e62ef4377ea4dc1aab2
+1ff5af18d045e8f30a2a0367470db4e8225a785c
diff --git a/third_party/pigweed b/third_party/pigweed
index a78ddd0..cfa4da0 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit a78ddd06be398fd4cd0289dd6b514c9325e513bc
+Subproject commit cfa4da0ff6f50b81e21c3343312e15caf41a2bdf