roll: third_party/pigweed b21016a..c18cd91 (7 commits)

c18cd91:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/275092 pw_kernel: Tokenize the kernel
2ec20de:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/280072 targets: rm includes
e832fa7:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/280053 presubmit: Ignore GN and CMake checks for files in pw_kernel
063230e:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/279553 pw_kernel: Change console to write lines atomically
25c6d51:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/280054 pw_kernel: Set riscv stack to top instead of bottom of region
95040aa:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/278014 pw_bluetooth: Add AVDTP_GET_CAPABILITIES parser
826f383:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/280052 pw_kernel: Fix incorrect assert on cortex-m in qemu

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: b21016a5cc7d8e..c18cd911073fd1
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8719109443680420001
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I6c5537ccbfd9d09cfc96f1363a129ff8f7cd2983
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/279937
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index b21016a..c18cd91 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit b21016a5cc7d8ea1cafd9fff4c2db8af849c48f7
+Subproject commit c18cd911073fd128f4ecb0387af7b6b494962fe8