Add AddressSanitizer support via CMake

Change-Id: I55dc5ef0972f6c51d59b2ff52276062965e04a90
Reviewed-on: http://review.couchbase.org/42540
Tested-by: Mark Nunberg <mnunberg@haskalah.org>
Reviewed-by: Sergey Avseyev <sergey.avseyev@gmail.com>