[third_party/pigweed] Roll 6 commits

cd86f4e6e19ca9f pw_docgen: Update module metadata status badge col
5dab2b02e018ab5 pw_multibuf: Contiguous span functions
b6793d4757bc535 pw_multibuf: Functions for copying into and out of
667445792269183 pw_multibuf: Truncate after an iterator
b5068bcebcbf397 pw_build: Introduce pw_py_test to bazel
51e996e5c204e9a pw_system: Console interactive serial port selecti

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 6b2fe95f4b7a70d..cd86f4e6e19ca9f
Roller-URL: https://ci.chromium.org/b/8745470200954305713
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Id2a27f7383d040937980aada23b05a4cd3e69ca8
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/215354
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 6b2fe95..cd86f4e 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 6b2fe95f4b7a70dbab728dee745cec14f46652b1
+Subproject commit cd86f4e6e19ca9f82f12c724283c34d7ff2b165e