Split Ogg packets larger than 64kb into multiple pages

The implementation is not very efficient, but the current Ogg
code makes it hard to write it properly. :(

Patch by Marc Halbruegge
BUG:171957


git-svn-id: svn://anonsvn.kde.org/home/kde/trunk/kdesupport/taglib@1019459 283d02a7-25f6-0310-bc7c-ecb5cbfe19da