Reduce logger stderr spam

Change-Id: I8dce46d924c72eac1ad6a6e7c0989c640bbebd15
Signed-off-by: James Kuszmaul <james.kuszmaul@bluerivertech.com>
diff --git a/aos/events/logging/log_writer.cc b/aos/events/logging/log_writer.cc
index db6bcc1..312a6ae 100644
--- a/aos/events/logging/log_writer.cc
+++ b/aos/events/logging/log_writer.cc
@@ -249,7 +249,7 @@
     aos::SizePrefixedFlatbufferDetachedBuffer<LogFileHeader> config_header =
         PackConfiguration(configuration_);
     config_sha256 = Sha256(config_header.span());
-    LOG(INFO) << "Config sha256 of " << config_sha256;
+    VLOG(1) << "Config sha256 of " << config_sha256;
     log_namer->WriteConfiguration(&config_header, config_sha256);
   }