emulators/virtualbox-ose-*72: Update 7.2.16 => 7.2.18 (19 CVEs)

Changelog:
https://www.virtualbox.org/wiki/Changelog-7.2#v18

Oracle Critical Security Patch Update Advisory - September 2026:
https://www.oracle.com/security-alerts/cspusep2026.html#AppendixOVIR

Sponsored by: UNIS Labs
Security: CVE-2026-87273
Security: CVE-2026-87268
Security: CVE-2026-87269
Security: CVE-2026-87270
Security: CVE-2026-87271
Security: CVE-2026-87272
Security: CVE-2026-87276
Security: CVE-2026-87277
Security: CVE-2026-87278
Security: CVE-2026-87279
Security: CVE-2026-87282
Security: CVE-2026-87283
Security: CVE-2026-87285
Security: CVE-2026-87267
Security: CVE-2026-87275
Security: CVE-2026-87274
Security: CVE-2026-87280
Security: CVE-2026-87281
Security: CVE-2026-87284
MFH: 2026Q3