[third_party/pigweed] Roll 2 commits

2d60e4da9f5c491 docs: Begin Doxygenification of pw::i2c::Initiator
c92d17c531d8961 pw_log_tokenized: Add gcc_partially_tokenized back

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 5fae7709031d854..2d60e4da9f5c491
Roller-URL: https://ci.chromium.org/b/8779371549261227953
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Ic4652df8b37a4a0d89adef88e8c77a5e3728e3ee
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/150274
Bot-Commit: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
Commit-Queue: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index 5fae770..2d60e4d 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 5fae7709031d85416239e233ab8312ad08132595
+Subproject commit 2d60e4da9f5c491925797e77e08ca92953f61abf