The spec of `Lookup::defineClass` specifies to throw linkage error
including `VerifyError` and JDK-8238358 fixes the implementation to
match the spec [1].
This patch updates the spec to make it clear as proposed in the
CSR:https://bugs.openjdk.java.net/browse/JDK-8240338. Also add a new
test case to verify that `defineClass` does link a class.
Webrev at:
http://cr.openjdk.java.net/~mchung/jdk15/webrevs/8238195/webrev.00/
Thanks
Mandy
[1]
https://mail.openjdk.java.net/pipermail/core-libs-dev/2020-March/065456.html
