[code-reflection] Integrated: add extern C and minize square output

[Gary Frost]

On Mon, 26 May 2025 14:45:19 GMT, Gary Frost <gfrost at openjdk.org> wrote:

> Mock backend was broken, compiled, but fgailed to link at runtime. 
> 
> I added `extern"C"` to getBackend method.
> 
> Also cleaned up/minimized output from squares and violajones examples.
> 
> Ensured that `java @hat/clean` removed cached src dirs (this needs refactoring).

This pull request has now been integrated.

Changeset: 288b6628
Author:    Gary Frost <gfrost at openjdk.org>
URL:       https://git.openjdk.org/babylon/commit/288b662861f8141d7e85104f409504ce158a0e7c
Stats:     17 lines in 4 files changed: 9 ins; 0 del; 8 mod

add extern C and minize square output

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PR: https://git.openjdk.org/babylon/pull/434