fix #1028 by trying load libpthread.so.0 on Kobo devices
fix #1028 by trying load libpthread.so.0 on Kobo devices

Hzj-jie/koreader,koreader/koreader,chrox/koreader,Frenzie/koreader,NiLuJe/koreader,ashang/koreader,NiLuJe/koreader,mihailim/koreader,chihyang/koreader,koreader/koreader,Markismus/koreader,ashhher3/koreader,mwoz123/koreader,houqp/koreader,apletnev/koreader,lgeek/koreader,noname007/koreader,robert00s/koreader,poire-z/koreader,pazos/koreader,NickSavage/koreader,poire-z/koreader,frankyifei/koreader,Frenzie/koreader