Fix missing vendor dir

vendor/github.com/shirou/gopsutil/internal/common/sleep.go

@@ -0,0 +1,18 @@
+package common
+
+import (
+	"context"
+	"time"
+)
+
+// Sleep awaits for provided interval.
+// Can be interrupted by context cancelation.
+func Sleep(ctx context.Context, interval time.Duration) error {
+	var timer = time.NewTimer(interval)
+	select {
+	case <-ctx.Done():
+		return ctx.Err()
+	case <-timer.C:
+		return nil
+	}
+}