[crac] RFR: Fix clang compilation error

[Radim Vansa]

On Mon, 25 Sep 2023 14:24:47 GMT, Jan Kratochvil <jkratochvil at openjdk.org> wrote:

> src/hotspot/share/gc/g1/g1CollectedHeap.hpp:1023:16: error: 'finish_collection' overrides a member function but is not marked 'override' [-Werror,-Winconsistent-missing-override]
>   virtual void finish_collection() {
>                ^
> src/hotspot/share/gc/shared/collectedHeap.hpp:396:16: note: overridden virtual function is here
>   virtual void finish_collection() {}
>                ^

Marked as reviewed by rvansa (Committer).

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PR Review: https://git.openjdk.org/crac/pull/117#pullrequestreview-1643487524