Hide an unneeded ar65 status message.

If **ar65** must create a library file, then it gives us a warinig message.  But, a warning should be given only if an event is something that we prefer didn't happen (even though it isn't fatal).  However, we want library files to be created when they don't exist already.   It's a normal event; we don't need to be told about it.

Therefore, this commit makes the archiver inform, not warn, us about libraries.  And, it shows the line only if we ask to see it (by telling ar65 to be verbose).