Update meta for release 2.1.2

Package version will be 2.1.2
Library version will be 2.0.10

Change-Id: I63bd96d9de4efadc3255839189fee90e159c6d40
Reviewed-on: http://review.couchbase.org/28582
Reviewed-by: Matt Ingenthron <matt@couchbase.com>
Tested-by: Sergey Avseyev <sergey.avseyev@gmail.com>