roll: third_party/pigweed: pw_tokenizer: Use uint64_t for calculation

Some compilers treat the intermediate calculation as multiplication
and addition overflow when UBSanitizer is enabled because the
arithmetic logic is using uint32_t as containers that get overflow with
the multiplication and addition.
Since the token is compile time evaluated, using uint64_t as containers
won't make any differences but can safely pet the compilers.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/232851

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: f85d4f62a404caa..f438978ee6805ca
Roller-URL: https://ci.chromium.org/b/8737779360482715489
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Ibc4a62f73bcca7e91ad7a7d1c38311b5e73efcb7
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/233711
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index f85d4f6..f438978 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit f85d4f62a404caa144d337851815ca21e4dadf54
+Subproject commit f438978ee6805ca50835377581c78b8fe7a8c96e