7021987: native2ascii "file cannot be read" error message is broken

[Alan Bateman]

I need a reviewer for a small regression in the native2ascii tool 
whereby its error messages aren't as expected. Early in the jdk7 this 
code appears to have been changed to address a "non-varargs call of 
varargs method" warning in a usage of MessgaeFormat.format. A cast was 
added to cast a String[] to an Object resulting in the compiler treating 
it as a varargs call. I've  used the opportunity to eliminate a raw type 
warning in this code and replace a usage of legacy j.u.Vector with List. 
This is old code with other "opportunities" to do cleanup but I don't 
have time to spent time on it. The webrev with the changes is here:
  http://cr.openjdk.java.net/~alanb/7021987/webrev/

Thanks,
Alan.