Bump base (sdcv 0.5.2; fix *buntu 17.10 build & segfault) (#3378)
Bump base (sdcv 0.5.2; fix *buntu 17.10 build & segfault) (#3378)

Fixes #3302. Fixes #3071.
lgeek/koreader,poire-z/koreader,Hzj-jie/koreader,poire-z/koreader,Frenzie/koreader,apletnev/koreader,koreader/koreader,Markismus/koreader,pazos/koreader,mihailim/koreader,NiLuJe/koreader,Frenzie/koreader,houqp/koreader,NiLuJe/koreader,mwoz123/koreader,koreader/koreader