LuaDefaults: Look for defaults.lua in $PWD first
LuaDefaults: Look for defaults.lua in $PWD first

As DataDir may not exist yet.

Fix #9593

koreader/koreader,Frenzie/koreader,NiLuJe/koreader,Frenzie/koreader,poire-z/koreader,poire-z/koreader,NiLuJe/koreader,koreader/koreader