RFR: 8279018: CRC calculation in CDS should not include _version and _head_size [v3]

[Yumin Qi]

On Wed, 22 Dec 2021 03:32:01 GMT, Calvin Cheung <ccheung at openjdk.org> wrote:

>> Yumin Qi has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Explicitly include cds.h and add INCLUDE_CDS for CDS only code
>
> Update seems fine.

@calvinccheung @iklam Thanks for review!

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PR: https://git.openjdk.java.net/jdk/pull/6899