Revert "freetype2: cleanup dangling symlink"

This reverts commit 502a9e56539462fad0d5a5e2cb186e0a3f60cccd.
freetype2: "fix" /usr/include/freetype symlink

Yes, this is not the way to go.
Yes, it's much better to fix each and every single
module which uses freetype wrongly.
No, I'll not do that. If you want to: start with cmake's FindFreetype.cmake...