fix(ios): fix toString() for binary blobs

should report "[object TiBlob]" Fixes TIMOB-27350

Author: vijaysingh-axway

common/Resources/ti.internal/extensions/ti/ti.blob.js

@@ -9,6 +9,7 @@ if (Ti.Platform.osname === 'iphone' || Ti.Platform.osname === 'ipad') {
 constbuffer=Ti.createBuffer({value: ''});
 constblob=buffer.toBlob();
 blob.constructor.prototype.toString=function(){
-returnthis.text;
+constvalue=this.text;
+return(value===undefined) ? '[object TiBlob]' : value;
 };
 }