[roll third_party/pigweed] pw_tokenizer: Custom tokenization macro support

- Make the pw::tokenizer::EncodeArgs function and pw_tokenizer_ArgTypes
  typedef public.
- Update the pw::tokenizer::EncodedMessage class to make it simpler to
  use. Also, use memcpy instead of aliasing the token.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/39984

third_party/pigweed Rolled-Commits: 7c8b339ca254a8a..bcf0735f0c5e7fc
Roller-URL: https://ci.chromium.org/b/8850656730197100736
Cq-Cl-Tag: roller-builder:pigweed-sample-project-roller
Cq-Cl-Tag: roller-bid:8850656730197100736
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I43db4117251e666d9d1daae5aba324338bf4a929
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/sample_project/+/40066
Reviewed-by: 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 7c8b339..bcf0735 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 7c8b339ca254a8a56a27d34be7c551bb3ec94e9c
+Subproject commit bcf0735f0c5e7fc7fd80cbf033f6403980269ead