roll: third_party/pigweed ab6bcf5..494717f (2 commits)

494717f:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/309434 Reland "docs: Enable Doxylink"
4bdcd99:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/310672 doxygen: Prepare for tab style customizations

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: ab6bcf5e97f77c..494717f520908d
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8707417021432609681
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I1ee62e863f7c2641e2d1441fc7bda3956bfc1a98
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/310654
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.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 ab6bcf5..494717f 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit ab6bcf5e97f77ce7712f7f8fa239be8915de36e4
+Subproject commit 494717f520908dc9d351dc612b9741270d3f117d