RFR: 8161274: [JVMCI] compiler/jvmci/events/JvmciNotifyInstallEventTest.java fails with NoClassDefFound

[Doug Simon]

Please review this fix for a failure under -TieredCompilation caused by an attempt to compile with JVMCI before the VM is sufficiently booted to initialize JVMCI. This is the same problem addressed by JDK-8160121. The only problem is that the fix was too localized - it only applied on tiered compilation paths. The proper fix is to test for JVMCI compilabilty in CompileBroker::compile_method.

https://bugs.openjdk.java.net/browse/JDK-8161274
http://cr.openjdk.java.net/~dnsimon/8161274/

-Doug