Calls array and intrinsic stub routines in shenandoahSupport.cpp

[Jamil Nimeh]

Hello all,

Volodymyr and I have implemented some new intrinsics for JDK 20 (see 
OpenJDK PRs https://github.com/openjdk/jdk/pull/7702 and 
https://github.com/openjdk/jdk/pull/10582).  Volodymyr recently came 
across the calls[] array in shenandoahSupport.cpp and was wondering 
whether our new intrinsics need to be added to this array and what the 
impact of having there there or not is.

I'm not on this list (and I'm guessing Volodymyr is not either) so if 
you could please include us directly in the reply that would be helpful.

Thanks,

--Jamil