[10] RFR: 8160199: Language's script should be reflected in user.script on Mac OS X

[Naoto Sato]

Hello,

Please review the fix to the following issue:

https://bugs.openjdk.java.net/browse/JDK-8160199

The fix is located at:

http://cr.openjdk.java.net/~naoto/8160199/webrev.03/

The gist of the issue was that the script code has not been properly 
treated in macOS specific code. Since it shares the same code with other 
Unix, the locale format should follow POSIX, such as az-Cyrl-AZ needing 
to be az_AZ at Cyrl.

Naoto