Add sqlite-kvstore/sqlite-vfs.c to build
Add sqlite-kvstore/sqlite-vfs.c to build

It will fix the build error on windows.

Change-Id: I80c841f622743ccf19fa1a6a2f49429ca2d725ea
Reviewed-on: http://review.couchbase.org/13400
Tested-by: Bin Cui <ed18693fff32c00e22495f4877a3b901bed09041@gmail.com>
Reviewed-by: Steve Yen <ef850f73f7832052d3c6d9b5ddd3a1716d9a57f1@gmail.com>

abhinavdangeti/ep-engine,sriganes/ep-engine,membase/ep-engine,couchbase/ep-engine,jimwwalker/ep-engine,jimwwalker/ep-engine,daverigby/ep-engine,owendCB/ep-engine,daverigby/kv_engine,couchbaselabs/ep-engine,hisundar/ep-engine,sriganes/ep-engine,couchbaselabs/ep-engine,daverigby/ep-engine,couchbase/ep-engine,daverigby/ep-engine,teligent-ru/ep-engine,hisundar/ep-engine,abhinavdangeti/ep-engine,abhinavdangeti/ep-engine,jimwwalker/ep-engine,sriganes/ep-engine,membase/ep-engine,couchbase/ep-engine,daverigby/kv_engine,membase/ep-engine,sriganes/ep-engine,owendCB/ep-engine,hisundar/ep-engine,teligent-ru/ep-engine,teligent-ru/ep-engine,couchbaselabs/ep-engine,couchbaselabs/ep-engine,couchbase/ep-engine,teligent-ru/ep-engine,daverigby/kv_engine,owendCB/ep-engine,abhinavdangeti/ep-engine,jimwwalker/ep-engine,daverigby/ep-engine,abhinavdangeti/ep-engine,couchbaselabs/ep-engine,hisundar/ep-engine,owendCB/ep-engine,membase/ep-engine,daverigby/kv_engine