[roll third_party/pigweed] pw_rpc_transport: Set HDLC address to pw_rpc default

Allow Hdlc encoder to set the address encoded in packet. By default use
the value pw_rpc/pw_console uses to indicate an RPC.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/153272

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 1f8a9744920941f..c9778b05a585e42
Roller-URL: https://ci.chromium.org/b/8777112549432021201
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I9f135379f73de5f0006865bb8f6e4dcc46290192
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/153410
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index 1f8a974..c9778b0 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 1f8a9744920941fedfd732b9c28361287f690947
+Subproject commit c9778b05a585e42b2820340d96dcb6121702360a