www/iaito: Update 6.0.0 => 6.0.4

Changelogs:
https://github.com/radareorg/iaito/releases/tag/6.0.2
https://github.com/radareorg/iaito/releases/tag/6.0.4

While here made some minor port optimizations.

PR: 290016
MFH: 2025Q4
(cherry picked from commit d816c0fc9ac77414ce43bda353441ace73bd74c8)