libsdl2-ttf release 2.24.0+dfsg-3 for unstable

[dgit distro=debian split --quilt=unapplied]
[dgit please-upload source=libsdl2-ttf version=2.24.0+dfsg-3 upstream-tag=upstream/2.24.0+dfsg upstream=409690a0ca5a7dc3138ba3b8b3cf0758d70787e0]