temporarily disable ffi blitbuffer module since paintRect is not working properly in the new blitbuffer as reported in #274.
temporarily disable ffi blitbuffer module
since paintRect is not working properly in the new
blitbuffer as reported in #274.

apletnev/koreader-base,houqp/koreader-base,Hzj-jie/koreader-base,NiLuJe/koreader-base,frankyifei/koreader-base,Hzj-jie/koreader-base,Frenzie/koreader-base,Hzj-jie/koreader-base,houqp/koreader-base,NiLuJe/koreader-base,Hzj-jie/koreader-base,koreader/koreader-base,Frenzie/koreader-base,Frenzie/koreader-base,houqp/koreader-base,apletnev/koreader-base,NiLuJe/koreader-base,koreader/koreader-base,Frenzie/koreader-base,frankyifei/koreader-base,frankyifei/koreader-base,NiLuJe/koreader-base,koreader/koreader-base,houqp/koreader-base,apletnev/koreader-base,apletnev/koreader-base,frankyifei/koreader-base,koreader/koreader-base