Yesterday's build/integration of the JSSE used classfile version 50, but some of the
bootstrap build uses JDK 5, which doesn't understand the v50 file format. We have a
couple of options:

    Change the bootstrap sections to not use JSSE. I don't know if this
    is possible, I'm not sure what they depend on.

    Build/integrate jsse.jar using -target 1.5 until the bootdir uses mustang.

I think the second is the most likely immediate fix, but we lose any new functionality
from the v50 class file format. We should try to change the bootstrap sections,
if we can. I have a question into jdk-integrators to figure out when we'll switch
to a mustang bootstrap, in case we can't break the dependency.

This needs a fix before we can proceed.