RFR: 7903201: README.md referes to old API and old generated code pattern

[Athijegannathan Sundararajan]

On Fri, 27 May 2022 08:07:23 GMT, Maurizio Cimadamore <mcimadamore at openjdk.org> wrote:

>> * fixed README.md for new API usage and new generated code pattern
>> * --version uses module version rather than java.version
>> * fixed makefile --module-version to be 19
>
> README.md line 97:
> 
>> 95: 
>> 96: ```java
>> 97: static final FunctionDescriptor distance$FUNC = FunctionDescriptor.of(Constants$root.C_DOUBLE$LAYOUT,
> 
> Nothing changed here right? Just indent?

Yes. I cut-pasted the new output from latest jextract. May have changed alignment in the process.

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PR: https://git.openjdk.java.net/jextract/pull/42