RFR: 8152926: PropertyResourceBundle constructor don't understand the System.setProperty change

[Masayoshi Okutsu]

Hi,

Please review the fix for JDK-8152926. This is a doc fix to clarify 
initialization of the encoding information with the 
java.util.PropertyResourceBundle.encoding property.

Issue:
https://bugs.openjdk.java.net/browse/JDK-8152926

Webrev:
http://cr.openjdk.java.net/~okutsu/9/8152926/webrev.00/

Thanks,
Masayoshi