fix(tests) replace use of iconv in SearchTestCase.php

Author: connorhu

tests/SearchTestCase.php

@@ -229,7 +229,7 @@ public function testUtf8AnalyzerKnowsToHandleOtherEncodingsWorks()
         $analyzer = new Doctrine_Search_Analyzer_Utf8();
 
         // convert our test string to iso8859-15
-        $iso = iconv('UTF-8','ISO8859-15', 'un éléphant ça trompe énormément');
+        $iso = mb_convert_encoding('un éléphant ça trompe énormément', 'ISO-8859-15', 'UTF-8');
 
         $words = $analyzer->analyze($iso, 'ISO8859-15');
         $this->assertEqual($words[1], 'éléphant');