CBLT-319:  put 'release_tmp/' and 'home_phone.txt' in WORKSPACE if defined, PWD otherwise

Change-Id: Idab212db7c4a04d8e7fc7280b604d76ed5dbcbe7
Reviewed-on: http://review.couchbase.org/38564
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>