Review Request for JDK-8135061: java.util.Locale#lookup throws java.lang.StringIndexOutOfBoundsException for range having '-' as second character

[Nishit Jain]

Hi,

Please review the fix for JDK-8135061
Bug: https://bugs.openjdk.java.net/browse/JDK-8135061
Webrev: http://cr.openjdk.java.net/~nishjain/8135061/webrev.01/

Fix : Added a check on the lastIndexOf "-" before using substring for 
truncating the extension key

Regards,
Nishit Jain