[10] RFR JDK-8177472: Remove hard-coded IANA Subtag Registry map in LocaleEquivalentMap.java

[Nishit Jain]

Hi,

Please review the fix for JDK-8177472

Bug: https://bugs.openjdk.java.net/browse/JDK-8177472
Webrev: http://cr.openjdk.java.net/~nishjain/8177472/webrev.05/

Issue:The existing process of updating the LSR data requires manual 
execution of EquivMapsGenerator.java for generation of the updated maps.
Fix:The execution of EquivMapsGenerator.javafor generation of maps is 
included in the JDK build process. After this change updation of LSR 
data will mostly require replacement of old language-subtag-registry.txt 
file with the new one and changing the copyright year in 
EquivMapsGenerator.java (if required) for the generated maps file.

Regards,
Nishit Jain