roll: third_party/pigweed: pw_cli: Add in option to retrieve commit date

Adding in a function to get a datetime object of
the commit author time.
Test: Passes presubmit checks

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/216275

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 114064192788e79..dbbbad542b74bcd
Roller-URL: https://ci.chromium.org/b/8737690822680159841
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I6478072071a9dd71491978859ebf70cba925fcb4
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/233977
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 1140641..dbbbad5 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 114064192788e798a874673639f712441b803af4
+Subproject commit dbbbad542b74bcdab378a51b91283281ad4f4eb7