[13] RFR(L) 8220623: [JVMCI] Update JVMCI to support JVMCI based Compiler compiled into shared library

[Tom Rodriguez]

> This is the original fix I had for this:
> 
>            CompilerThread* ct = (CompilerThread*) thr;
>            if (ct->compiler() == NULL || !ct->compiler()->is_jvmci() JVMCI_ONLY(|| !UseJVMCINativeLibrary)) {
>              num_active_compiler_thread++;
>            } else {
>              // When using a compiler in a JVMCI shared library, it's possible
>              // for one compiler thread to grab a lock in the shared library,
>              // enter HotSpot and go to sleep on the shutdown safepoint. Another
>              // JVMCI shared library compiler thread can then attempt to grab the
>              // lock and thus never make progress.
>            }
> 
> which is probably the right one. I hadn’t realized that a JavaGraal
> (as opposed to libgraal) JVMCI compiler thread blocked on a lock will be in
> the blocked state, not in the _thread_in_native state.

I think it would be ok to go back to your original fix.

tom