[roll third_party/pigweed] pw_checksum: Add TODO for linker error

Add TODO for b/284002266

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/148591

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 79de9167ffc6d7b..27cb20d0b4d007a
Roller-URL: https://ci.chromium.org/b/8780205553748736945
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I0d999f4f2f39ad5738af0cdb67aac6a78fc035a7
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/148711
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 79de916..27cb20d 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 79de9167ffc6d7bc18b50ecb19e2fc2a7efe01a1
+Subproject commit 27cb20d0b4d007a0d41129511d6f174c7547fcd0