MB-8131: Have to copy explicit icu dlls with version number

Change-Id: I63bab95958baf77729bf90a2288c8a8bb3591798
Reviewed-on: http://review.couchbase.org/25957
Tested-by: Bin Cui <bin.cui@gmail.com>
Reviewed-by: Sriram Melkote <siri.couchbase@gmail.com>
Reviewed-by: Steve Yen <steve.yen@gmail.com>