roll: third_party/pigweed pw_thread: Support 64-bit thread priorities

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/306177
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Original-Revision: af17c33ababcca779bdb293b6e918aa22dea93ed

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: 7c47be925403f3..af17c33ababcca
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8709039553850172625
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I4eb4ba51f92da0079c765d1664bb6b83c66c930a
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/306312
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Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
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diff --git a/third_party/pigweed b/third_party/pigweed
index 7c47be9..af17c33 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 7c47be925403f316d485b3879e931eda35e28ed1
+Subproject commit af17c33ababcca779bdb293b6e918aa22dea93ed