Update getID3 library to 1.9.8.

Changes:
https://github.com/JamesHeinrich/getID3/compare/1.9.7...v1.9.8

Fixes #29627.

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git-svn-id: http://core.svn.wordpress.org/trunk@29508 1a063a9b-81f0-0310-95a4-ce76da25c4cd