RFR: 8293245: x86_64: Extract Adler32 stub implementation into stubGenerator_x86_64_adler.cpp

[Dean Long]

On Thu, 1 Sep 2022 18:19:06 GMT, Vladimir Ivanov <vlivanov at openjdk.org> wrote:

> Extract Adler32 stub implementation into a dedicated file (`stubGenerator_x86_64_adler.cpp`).
> 
> Minor cleanups:
>   * got rid of `updateBytesAdler32()` by manually inlining it into  `generate_updateBytesAdler32()`
>   * unified usage of `r14` as a scratch register
>   * added 32-byte alignment for the constants
> 
> Testing: hs-tier1 - hs-tier4

Marked as reviewed by dlong (Reviewer).

-------------

PR: https://git.openjdk.org/jdk/pull/10126