build: Add missing <unistd.h> include
Missing header was caught by clang upgrade.
Bug: b/369386439
Change-Id: Ibd35e4c9c1881aa8791fc664b9425bd9adda9526
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/showcase/sense/+/238232
Pigweed-Auto-Submit: Dave Roth <davidroth@google.com>
Reviewed-by: Armando Montanez <amontanez@google.com>
Commit-Queue: Auto-Submit <auto-submit@pigweed-service-accounts.iam.gserviceaccount.com>
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
Presubmit-Verified: CQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com>
diff --git a/targets/host/system.cc b/targets/host/system.cc
index 665ae2e..e54f4eb 100644
--- a/targets/host/system.cc
+++ b/targets/host/system.cc
@@ -16,6 +16,7 @@
#include <signal.h>
#include <stdio.h>
+#include <unistd.h>
#include "modules/air_sensor/air_sensor_fake.h"
#include "modules/board/board_fake.h"
