[roll pigweed] third_party/fuchsia: Copybara import of the fit library

  - 0659b3e74a87f78b5e50d92eaee0ea87857a9bd1 [fit] Reduce unnecessary padding in fit::function_base

GitOrigin-RevId: 0659b3e74a87f78b5e50d92eaee0ea87857a9bd1
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/106851

https://pigweed.googlesource.com/pigweed/pigweed
pigweed Rolled-Commits: 64fb8479feb4af3..15ed2fce7c41f57
Roller-URL: https://ci.chromium.org/b/8805650661852287297
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I726c29da9ec6a1326808494a3c15c4442f215ce8
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/zephyr-integration/+/106891
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/pigweed b/pigweed
index 64fb847..15ed2fc 160000
--- a/pigweed
+++ b/pigweed
@@ -1 +1 @@
-Subproject commit 64fb8479feb4af350f9ff2bea3318c9866ea9c40
+Subproject commit 15ed2fce7c41f57f6b6acc35a6d771c81ef60b13