[9] RFR: 8174779: Locale issues with Mac 10.12

[Naoto Sato]

Hello,

Please review the fix to the following issue:

https://bugs.openjdk.java.net/browse/JDK-8174779

The proposed fix is located at:

http://cr.openjdk.java.net/~naoto/8174779/webrev.01/

The root cause of the problem was that starting from macOS 10.12, it 
returns the preferred user language including both script and region, 
which cannot be dealt with the existing parsing code.

Naoto