[8u40] request for approval: 8062608: BCEL corrupts debug data of methods that use generics

[david buck]

Hi!

Please approve this backport from jdk9 to jdk8u-dev

JDK9 changeset: http://hg.openjdk.java.net/jdk9/dev/jaxp/rev/fe179de493b1
bug url: https://bugs.openjdk.java.net/browse/JDK-8062608

Changes apply cleanly after modularization (de)shuffle. Builds and 
passes testcase from the bug report.

Cheers,
-Buck