Backport patch for CVE-2026-20884. Backport fixes for CVE-2026-20889 CVE-2026-21413 CVE-2026-24450 CVE-2026-24660 Update to libraw-0.21.5.

Source: Fedora 42 mingw-LibRaw Critical Exec Issues CVE-2026-20884 2026-826db1b5c0