Use mkdirp from platform/dirutils instead of mkdir
Use mkdirp from platform/dirutils instead of mkdir

Change-Id: I23e945ae036849f0d6548c1337af86b9b7f6fa6d
Reviewed-on: http://review.couchbase.org/49391
Tested-by: buildbot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Reviewed-by: Chiyoung Seo <fcffc23db27b19ee4ebba46695ee6b50e09216a2@couchbase.com>

owendCB/ep-engine,teligent-ru/ep-engine,sriganes/ep-engine,couchbase/ep-engine,daverigby/kv_engine,hisundar/ep-engine,daverigby/ep-engine,hisundar/ep-engine,daverigby/kv_engine,couchbase/ep-engine,teligent-ru/ep-engine,daverigby/ep-engine,sriganes/ep-engine,sriganes/ep-engine,membase/ep-engine,owendCB/ep-engine,hisundar/ep-engine,owendCB/ep-engine,teligent-ru/ep-engine,daverigby/ep-engine,sriganes/ep-engine,couchbase/ep-engine,hisundar/ep-engine,membase/ep-engine,membase/ep-engine,couchbase/ep-engine,daverigby/ep-engine,owendCB/ep-engine,membase/ep-engine,teligent-ru/ep-engine,daverigby/kv_engine,daverigby/kv_engine