[13u] RFR: 8228400: Remove built-in AArch64 simulator

[Yuri Nesterenko]

We need it for several reasons. Most important now is logistical: with this change
it would be easier to [try to] maintain parity, context compatibility, with 11u.

To me, the change looks good.

Thanks,
--yan

On 20.05.2020 11:18, Sergey Nazarkin wrote:
> Original change:
> https://bugs.openjdk.java.net/browse/JDK-8228400
> https://hg.openjdk.java.net/jdk/jdk/rev/01bca26734bb
> 
> 11u patch discussion
> https://mail.openjdk.java.net/pipermail/jdk-updates-dev/2019-July/001518.html
> 
> 13u webrev
> http://cr.openjdk.java.net/~snazarki/webrev/8228400/
> 
> The patch is applied cleanly except few files.  
>  - shenandoahBarrierSetAssembler_aarch64.cpp 
> 	blrt->blr fails due to context changes
> 
>  - sharedRuntime_aarch64.cpp 
> 	can’t remote BUILTIN_SIM block due to context changes
> 
>  - os_linux_aarch64.cpp 
> 	has additional defines and thus conflicts
> 	 can’t remote BUILTIN_SIM block due to context
> 
> 
> Testing: aarch64 hotspot:tier1, jdk:tier1
>