[third_party/pigweed] Roll 6 commits

7d620ba7b1b20f1 pw_toolchain_bazel: Remove deprecated action names
fd017242b215fad pw_compilation_testing: Skip tests excluded by the
8510c7de9b84223 pw_presubmit: Add more info to todo summary
cb2d8ae3fad591c pw_bytes: Fix compilation error occured with Werro
91075ebb2367073 docs: How to use a single Pigweed module in Bazel
853989651ead5f5 gitignore: Fix how we ignore bazel- directories

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 8a3a2c71f9b2793..7d620ba7b1b20f1
Roller-URL: https://ci.chromium.org/b/8757939614507875857
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Ia853ccb92f6a93ea4146ac49ae76e0c0d9f527bf
Reviewed-on: https://pigweed-review.googlesource.com/c/gonk/+/189152
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 8a3a2c7..7d620ba 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 8a3a2c71f9b27938fff83ecb31e461f001028283
+Subproject commit 7d620ba7b1b20f1cbc74538b2777c6c49cd09e66