build: add dist-clean target
build: add dist-clean target

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