[third_party/pigweed] Roll 8 commits

4d84714f44de7d6 pw_cpu_exception_cortex_m: Fix checks for ARMv8
bb558ed3c239189 rp2040: Raise minimal stack size to 1KB
dc5c87c532e5c75 pw_system: Simplify pw_system usage in Bazel
eeec5566194948d targets/rp2040: Refresh target docs
905d4268e336ff1 pw_clock_tree: Generic clock tree management
de0813bee2778fe pw_allocator: Move large values to test fixtures
22a0e55b88e62a5 *: Update Android.bp after GetAlignedSubspan move
6e1b3f4d2039aa1 pw_chre: Update CHRE revision

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: a13c1efc6afb86f..4d84714f44de7d6
Roller-URL: https://ci.chromium.org/b/8747341343000665857
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I4e509309ffa100dcfd60920ef30e75bb47e49da8
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/kudzu/+/210635
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 a13c1ef..4d84714 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit a13c1efc6afb86faf2a6b74044ed1d48a89f578f
+Subproject commit 4d84714f44de7d6c6c94fcedbdb0818642d6a91d