Add missing #includes in crc32.h

Change-Id: I197fe8c7afedb1b8a441b781a468a2a75d438e7b
Signed-off-by: Brian Silverman <brian.silverman@bluerivertech.com>
diff --git a/aos/events/logging/crc32.h b/aos/events/logging/crc32.h
index 7d21704..9e7c3f2 100644
--- a/aos/events/logging/crc32.h
+++ b/aos/events/logging/crc32.h
@@ -1,3 +1,7 @@
+#include <stdint.h>
+
+#include <optional>
+
 #include "absl/types/span.h"
 
 namespace aos {