update embedded C source from 3.8.2 to 3.8.4.3
re-apply ac45d80e28bf3252297291955ecdb9d4c8235884

workaround for the stat64 bug (https://ghc.haskell.org/trac/ghc/ticket/7072)
Merge pull request #236 from Philonous/master

update embedded qlite from 3.8.2 to 3.8.4.3