[third_party/pigweed] Roll 2 commits

3c54e88ddcd107d pw_console: Allow for custom word completion
bf5682a9ac50240 pw_console: Refactor embed free function

third_party/pigweed Rolled-Commits: b472896bb136b08..3c54e88ddcd107d
Roller-URL: https://ci.chromium.org/b/8839944437174742160
Cq-Cl-Tag: roller-builder:pigweed-experimental-roller
Cq-Cl-Tag: roller-bid:8839944437174742160
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I9db040539441091b8a316aedf8d5e7da8dfde000
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/55514
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 b472896..3c54e88 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit b472896bb136b08003a7bad36b87c0dd29809c6a
+Subproject commit 3c54e88ddcd107d96a47abc02f71c74301b0afc7