roll: third_party/pigweed pw_log_fuchsia: Add syslog dep to pw_log_fuchsia

This fixes bt_hci_virtual missing libsyslog.so.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/238552
Presubmit-Verified: CQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com>
Original-Revision: 42cff573c2016f8d0f78ef2f0db8cd9941601ab4

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: d31705b84d24f0..42cff573c2016f
Roller-URL: https://ci.chromium.org/b/8735613155982175009
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I2250059b9c6a929d1518502d550c2239e5ada6e5
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/238484
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index d31705b..42cff57 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit d31705b84d24f0ef17e6b8eef6cae13f96f942e4
+Subproject commit 42cff573c2016f8d0f78ef2f0db8cd9941601ab4