roll: third_party/pigweed pw_cli: GitRepo functions for rebase and commit information

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/404795
Original-Revision: 4a6290cc807ab11401aaa845fd500e865eda7f52

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: 7f94025356da71..4a6290cc807ab1
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8683126016622814097
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Ibd29fbab425157f2677c7a1314f84c67434698b9
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/404972
diff --git a/third_party/pigweed b/third_party/pigweed
index 7f94025..4a6290c 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 7f94025356da71b9214592872f7f6dd1053510f2
+Subproject commit 4a6290cc807ab11401aaa845fd500e865eda7f52