[roll third_party/pigweed] pw_hdlc: Create BUILD.bazel

Also add a BUILD.bazel file for one pw_build dependency.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/60740

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 931f4d54ab96caa..adacd1a992637b1
Roller-URL: https://ci.chromium.org/b/8836169477910204961
Cq-Cl-Tag: roller-builder:pigweed-sample-project-roller
Cq-Cl-Tag: roller-bid:8836169477910204961
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I7a02e030fa80551152885237a8d68e54f087224d
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/sample_project/+/60743
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 931f4d5..adacd1a 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 931f4d54ab96caa81e736ab7341cf82b3c973028
+Subproject commit adacd1a992637b123c55500f0a88e83325a2876e