[third_party/pigweed] Roll 4 commits

2eb14f7a17d5b3f pw_clock_tree: Introduce new ClockDivider class
086f478dfaf5958 pw_clock_tree: ClockTree support Element ops
e27b0834c0b4a96 pw_clock_tree: Introduce Element may_block()
b658add873a975a bazel: Explicitly load rules_python in BUILD.bazel

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: e0af1981782a05e..2eb14f7a17d5b3f
Roller-URL: https://ci.chromium.org/b/8747034741740728545
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Id7e9666921b42bd7095d61a328fe91dec6d82209
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/211543
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index e0af198..2eb14f7 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit e0af1981782a05e7751602dc143bb672ac8b19fa
+Subproject commit 2eb14f7a17d5b3f420897e7facd23eeaec2e2822