[roll third_party/pigweed] roll: rbe-client

From: git_revision:b65ab6193f48306ee427ff9fab3866352b01133e
To: git_revision:4a0a3bdfde6c19d6ef433d21a2d70e4bf9f93ac6

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/53580

third_party/pigweed Rolled-Commits: 0c94fc22f9ae1e0..178921954faf0d0
Roller-URL: https://ci.chromium.org/b/8841427711006004800
Cq-Cl-Tag: roller-builder:pigweed-experimental-roller
Cq-Cl-Tag: roller-bid:8841427711006004800
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Id4b0fe7ac18859388c35a7ccbef1a21ec37e22eb
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/53581
Reviewed-by: 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 0c94fc2..1789219 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 0c94fc22f9ae1e0f4cc3aad65a6f08c15913fccf
+Subproject commit 178921954faf0d0d6452e27ec59c9e9c6bf076ba