[roll third_party/pigweed] pw_rpc: Add missing integration test dependencies

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/56247

third_party/pigweed Rolled-Commits: 2395810f838518b..3f3bfbac3317d18
Roller-URL: https://ci.chromium.org/b/8839603237337231457
Cq-Cl-Tag: roller-builder:pigweed-experimental-roller
Cq-Cl-Tag: roller-bid:8839603237337231457
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Ic21324543d38c1853ad95b8250a2ac9bc9462cff
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/56381
Bot-Commit: 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 2395810..3f3bfba 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 2395810f838518b3c5f4b7e52aeb30306ed8d520
+Subproject commit 3f3bfbac3317d186c8cdb5a6bf65ceca55284556