RFR: 8249086: JDK 15 L10n resource file update - msg drop 10

[li.jiang at oracle.com]

Hi,

Pls review the l10n resource files update for JDK 15 msg drop 10.

Bug:
https://bugs.openjdk.java.net/browse/JDK-8249086

Webrev:
http://cr.openjdk.java.net/~ljiang/8249086/read/

Thanks,
Leo