[roll third_party/pigweed] pw_watch: Watch assembler source files

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/53900

third_party/pigweed Rolled-Commits: c11c5ac2536cea1..3c52fd35b6e7a1d
Roller-URL: https://ci.chromium.org/b/8841082952601384752
Cq-Cl-Tag: roller-builder:pigweed-experimental-roller
Cq-Cl-Tag: roller-bid:8841082952601384752
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I19f04600f241e0f3aaf90cd739f27f57b2b63f56
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/53864
Reviewed-by: 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 c11c5ac..3c52fd3 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit c11c5ac2536cea1d55eea25c73b78112b558646f
+Subproject commit 3c52fd35b6e7a1d762ba5706045bf40581a36ed0