Create directories for docjar, srcjar and jar targets
Create directories for docjar, srcjar and jar targets

Change-Id: I1c5523e0014c781bee41180f42b66da715d18bde
Reviewed-on: http://review.couchbase.org/25329
Tested-by: Deepti Dawar <65e820b6e97e5c89ca7f06f4d9d6c8d4de522495@globallogic.com>
Reviewed-by: Michael Nitschinger <97a35296d1b836d20f06df4c8d26a1141c9ad108@couchbase.com>

tootedom/spymemcached,tootedom/spymemcached-1,douxiaozhao/java-memcached-client,dustin/java-memcached-client,tootedom/spymemcached-1,dustin/java-memcached-client,douxiaozhao/java-memcached-client,tootedom/spymemcached,tootedom/spymemcached,couchbase/spymemcached,tootedom/spymemcached-1,Agilefant/spymemcached,douxiaozhao/java-memcached-client,HubSpot/java-memcached-client,couchbase/spymemcached,HubSpot/java-memcached-client,Agilefant/spymemcached,resrugam/java-memcached-client,Agilefant/spymemcached,resrugam/java-memcached-client,HubSpot/java-memcached-client,resrugam/java-memcached-client,couchbase/spymemcached,dustin/java-memcached-client