Bump base for ffi/framebuffer: set self.dpi in setDPI (#4734)
Bump base for ffi/framebuffer: set self.dpi in setDPI (#4734)

https://github.com/koreader/koreader-base/pull/841

Fixes #4726.
Frenzie/koreader,koreader/koreader,Markismus/koreader,Frenzie/koreader,poire-z/koreader,NiLuJe/koreader,Hzj-jie/koreader,mwoz123/koreader,koreader/koreader,poire-z/koreader,NiLuJe/koreader,houqp/koreader,pazos/koreader,mihailim/koreader