Fix broken build

Due to copy/paste from Google-internal branch.
I can't explain why I didn't test this; sorry.

Change-Id: I7b5f083a124c7cfb0fa6cb0506465a36bd79e983
Reviewed-on: https://go-review.googlesource.com/5654
Reviewed-by: Alan Donovan <adonovan@google.com>
diff --git a/cmd/oracle/main.go b/cmd/oracle/main.go
index ae98014..294bde7 100644
--- a/cmd/oracle/main.go
+++ b/cmd/oracle/main.go
@@ -137,10 +137,10 @@
 			ptalog = buf
 			defer func() {
 				if err := buf.Flush(); err != nil {
-					log.Errorf("flush: %s", err)
+					log.Printf("flush: %s", err)
 				}
 				if err := f.Close(); err != nil {
-					log.Errorf("close: %s", err)
+					log.Printf("close: %s", err)
 				}
 			}()
 		}