roll: third_party/pigweed cc646fb..cef99cf (8 commits)

cef99cf:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/278712 bazel: Update to latest rules_cc
96f1e37:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/277752 pw_env_setup: Add some Rosetta logging
e63f000:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/280976 pw_kernel: Remove nomem and nostack on interrupt guards
b78d7e2:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/280975 pw_kernel: Support usize registers
a1f21a8:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/278012 pw_bluetooth_sapphire: Acquire wake leases in AclDataChannel
7beeec2:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/280662 pw_ring_buffer: Implement PopBack
c02f54a:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/274334 pw_toolchain: Remove WORKSPACE toolchain helper
de2fc41:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/280661 pw_ring_buffer: Make iterator entry mutable

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: cc646fb3f6af61..cef99cfd680d92
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8718582647308036593
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I2a3efab11b07bb057cd78fcc48342bec0d4102bb
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/kudzu/+/281199
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 cc646fb..cef99cf 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit cc646fb3f6af61249949982cfe91447b4802ff13
+Subproject commit cef99cfd680d92cdafa25aabf9d8c4117f08cc0b