Request for approval to backport JDK-8068639: Make certain annotation classfile warnings opt-in

[Joseph D. Darcy]

Hello,

Please approve the backport from 9 to 7u of

     JDK-8068639: Make certain annotation classfile warnings opt-in

Bug: https://bugs.openjdk.java.net/browse/JDK-8068639
JDK 9 changeset: 
http://hg.openjdk.java.net/jdk9/dev/langtools/rev/0fbde6c61674
JDK 9 review: 
http://mail.openjdk.java.net/pipermail/compiler-dev/2015-January/009226.html

The shuffled patch from 9 applied cleanly other than the copyright 
update. All langtools regression tests on 7u pass with this change. (The 
backport to 8u will be handled subsequent to 7u.)

Thanks,

-Joe