Grow LOG_MESSAGE_LEN because we ran out of space

Change-Id: I214b88bbf04853f101e48b81fca7a9f764d53211
diff --git a/aos/logging/sizes.h b/aos/logging/sizes.h
index b624a61..d7cfd4e 100644
--- a/aos/logging/sizes.h
+++ b/aos/logging/sizes.h
@@ -3,7 +3,7 @@
 
 // This file exists so C code and context.h can both get at these constants...
 
-#define LOG_MESSAGE_LEN 500
+#define LOG_MESSAGE_LEN 512
 #define LOG_MESSAGE_NAME_LEN 100
 
 #endif  // AOS_LOGGING_SIZES_H_