freetype: fix include as they contain platform specific bits
freetype: fix include as they contain platform specific bits

tonibagur/kivy-ios,kivy/kivy-ios,kivy/kivy-ios,tonibagur/kivy-ios,rnixx/kivy-ios,rnixx/kivy-ios,cbenhagen/kivy-ios,cbenhagen/kivy-ios,kivy/kivy-ios