roll: third_party/pigweed 6cf3322..f2d9010 (7 commits)

f2d9010:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/379494 pw_kernel: Add additional tests to foreign_box
5edb7ce:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/379192 pw_kernel: Fix refcount bug with upcasting
383a73d:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/377754 pw_kernel: Terminate userspace threads on exception
9629572:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/374153 pw_kernel: Fix build cache trash between build and test
ea0f6e2:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/373953 pw_kernel: Remove SysTick CALIB assertion
ac41770:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/379334 pw_toolchain: Keep debuginfo for Rust targets in all compilation modes
b70eb97:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/371775 docs: Update lockfile instructions

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: 6cf3322bc86188..f2d9010e36a40a
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8688849106515055873
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I11592da7630379de8886f23fbc35a78db22166a4
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/379597
diff --git a/third_party/pigweed b/third_party/pigweed
index 6cf3322..f2d9010 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 6cf3322bc861880b5c97b9b6d611679313923f4d
+Subproject commit f2d9010e36a40a9c3f1ab0e2f96a92c29cce0a06