[third_party/pigweed] Roll 2 commits

d2fc5bdf6c65b61 pw_package: Use Pigweed mirror for google/emboss
05acd6452b65a63 pw_rpc: Support custom response messages in Synchr

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: eb7ded3f1a7c957..d2fc5bdf6c65b61
Roller-URL: https://ci.chromium.org/b/8770051802126152897
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I96315d0787d840d259736850bc5c5b4ceaa426e3
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/170732
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index eb7ded3..d2fc5bd 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit eb7ded3f1a7c9574f0ff22a98cc21a9d597e55ad
+Subproject commit d2fc5bdf6c65b61ea48056b4573a8585aff40955