Fix up logging on parcelable in .aidl file

Bug: None
Test: None

Change-Id: I65d328f3264027e12cac5828bd987b0b3ae338ae
diff --git a/aidl.cpp b/aidl.cpp
index e22e3d9..8e54211 100644
--- a/aidl.cpp
+++ b/aidl.cpp
@@ -490,7 +490,8 @@
     return AidlError::PARSE_ERROR;
   }
   if (parsed_doc->item_type != INTERFACE_TYPE_BINDER) {
-    cerr << "refusing to generate code from aidl file defining parcelable";
+    LOG(ERROR) << "refusing to generate code from aidl file defining "
+                  "parcelable";
     return AidlError::FOUND_PARCELABLE;
   }