[roll third_party/pigweed] pw_crypto: Get pw_crypto:ecdsa_uecc to bazel build

Small step towards getting all of pw_crypto building with bazel.

Tested: bazel build //pw_crypto:ecdsa_uecc
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/98304

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 2bc2d9b4ea8fe26..fa67698c831d115
Roller-URL: https://ci.chromium.org/b/8810729322739660289
Cq-Cl-Tag: roller-builder:pigweed-experimental-roller
Cq-Cl-Tag: roller-bid:8810729322739660289
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Ic44c6db174b669d1da4b1176f5a72df0cc09f8a5
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/98980
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 2bc2d9b..fa67698 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 2bc2d9b4ea8fe26d5ff8b4a19b3886b64a24635e
+Subproject commit fa67698c831d1154b708ef022fb199d699e0d0db