gh-102204: Fix endianness issue in AIX

[ayappanec]

This PR is to fix the problem mentioned in the issue #102204

• Issue: AIX build with XLC compiler fails with main branch #102204

[ayappanec]

Can someone review this ? It's a small change which fixes the _hacl module build in AIX.

[arhadthedev]

@gpshead (as an active core dev who participated in gh-99109 that introduced the file this PR changes).

[gpshead]

This code comes from the upstream HACL* project, can you also file an issue or PR with them to get AIX-relevant code into https://github.com/hacl-star/hacl-star/blob/main/dist/karamel/include/krml/lowstar_endianness.h?

[gpshead]

it looks like this was fixed upstream and we recently pulled in an updated hacl* when the sha3 code was merged. can you check main today and see if there is still any work to be done?

[ayappanec]

it looks like this was fixed upstream and we recently pulled in an updated hacl* when the sha3 code was merged. can you check main today and see if there is still any work to be done?

It works now. Thanks for the support.