Apply AsanFlags to all build components

Previously we wouldn't get full coverage because only the 'core' objects
were compiled with the proper flags. This makes the flags apply
universally.

Change-Id: I9a2fa1c44b5e3340469c85d36915082b0e030ea2
Reviewed-on: http://review.couchbase.org/42698
Tested-by: Mark Nunberg <mnunberg@haskalah.org>
Reviewed-by: Sergey Avseyev <sergey.avseyev@gmail.com>