[crac] RFR: Fix missing include file.

[Anton Kozlov]

On Fri, 11 Aug 2023 07:34:40 GMT, Jan Kratochvil <jkratochvil at openjdk.org> wrote:

> It is probably because I am using `--disable-precompiled-headers `.
> 
> src/hotspot/share/runtime/threads.cpp: In static member function 'static jint Threads::check_for_restore(JavaVMInitArgs*)': src/hotspot/share/runtime/threads.cpp:415:5: error: 'crac' has not been declared
>   415 |     crac::restore();
>       |     ^~~~
> src/hotspot/share/runtime/threads.cpp: In static member function 'static jint Threads::create_vm(JavaVMInitArgs*, bool*)':
> src/hotspot/share/runtime/threads.cpp:494:3: error: 'crac' has not been declared
>   494 |   crac::vm_create_start();
>       |   ^~~~

Marked as reviewed by akozlov (Lead).

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PR Review: https://git.openjdk.org/crac/pull/102#pullrequestreview-1574963541