RFR: 8293170: Improve encoding of the debuginfo nmethod section

[Boris Ulasevich]

On Thu, 22 Sep 2022 20:49:55 GMT, Vladimir Kozlov <kvn at openjdk.org> wrote:

> My builds failed:
> 
> ```
> src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/code/CompressedSparceDataReadStream.java:42: warning: [lossy-conversions] implicit cast from int to byte in compound assignment is possibly lossy
>        b |= (0xFF & curr_byte_) >> (8 - byte_pos_);
>                                 ^
> ```

Yes. It was a collision with "8244681: Add a warning for possibly lossy conversion in compound assignments" change. I rebased my branch and fixed the issue. Now it should be Ok.

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PR: https://git.openjdk.org/jdk/pull/10025