added <mkdir dir="${download.dir}"/> validate:pre:build target before calling the macro. 
added <mkdir dir="${download.dir}"/> validate:pre:build target before calling the macro. 

SVN-Revision: 10396

NCIP/caaers,CBIIT/caaers,CBIIT/caaers,CBIIT/caaers,CBIIT/caaers,NCIP/caaers,NCIP/caaers,CBIIT/caaers,NCIP/caaers