try to exclude those broken system fonts
try to exclude those broken system fonts

these fonts can not be used by freetype and will cause hang up

Markismus/koreader,poire-z/koreader,NickSavage/koreader,NiLuJe/koreader,NiLuJe/koreader,houqp/koreader,lgeek/koreader,mihailim/koreader,frankyifei/koreader,mwoz123/koreader,robert00s/koreader,Hzj-jie/koreader,pazos/koreader,poire-z/koreader,koreader/koreader,apletnev/koreader,Frenzie/koreader,Frenzie/koreader,chihyang/koreader,koreader/koreader