Bundle 'bsdio-inl.c'

It is not part of distribution since libcouchbase 2.4.2

Change-Id: I4959caf57551ffa1b6303f97f9342a872dd32647
Reviewed-on: http://review.couchbase.org/41782
Reviewed-by: Sergey Avseyev <sergey.avseyev@gmail.com>
Tested-by: Sergey Avseyev <sergey.avseyev@gmail.com>