[roll third_party/pigweed] pw_package: Update Emboss commit

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/173619

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 6c8f0837d6607b5..2d8176eb33654dd
Roller-URL: https://ci.chromium.org/b/8767949327488737041
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Ic8d9af9f2f02ed78d1fbdf84a3465f8708a7bd89
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/175032
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index 6c8f083..2d8176e 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 6c8f0837d6607b51d441357b6738a5fbb12f296c
+Subproject commit 2d8176eb33654ddd0d3bd53b91381ce9eff21204