Review Request JDK-8176333: jdeps error message should include a proper MR jar file name

[Mandy Chung]

http://cr.openjdk.java.net/~mchung/jdk9/webrevs/8176333/webrev.00/

This is a simple fix to jdeps to print the MR JAR file name in the error message.  The existing implementation icorrectly casts String[] as an Object that leads to print String[].toString() instead of the filename.

Mandy