RFR: 8214401: [AOT] crash in ClassLoaderData::is_alive() with AOTed jdk.base

[Erik Österlund]

Hi,

We currently miss out on cleaning IC caches of AOT methods during code 
cache unloading. This patch makes sure we do that.

Webrev:
http://cr.openjdk.java.net/~eosterlund/8214401/webrev.00/

Bug:
https://bugs.openjdk.java.net/browse/JDK-8214401

Thanks,
/Erik