[roll third_party/pigweed] pw_package: Add "micro-ecc"

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/54708

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: ad04bb09e6f1119..df38a7de0dd6fa4
Roller-URL: https://ci.chromium.org/b/8838062747421208257
Cq-Cl-Tag: roller-builder:pigweed-experimental-roller
Cq-Cl-Tag: roller-bid:8838062747421208257
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I8874c4460654e5c0b1d6fd1ac55c9a2758bbb77f
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/58029
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 ad04bb0..df38a7d 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit ad04bb09e6f1119c5459e7ea4797de6073d2a973
+Subproject commit df38a7de0dd6fa4ee3939748d8ed6cec29475e4a