Description:
------------
If you create ZIP file with custom assigned UTF-8 filenames for compressed files, resulting ZIP won't save those filenames correctly.

Reproduce code:
---------------
<?php
	$files = array(
		'0.txt' => 'regular.txt',
		'1.txt' => '??????.txt',
		'2.txt' => '?&#273;?&#263;&#273;?.txt',
		'3.txt' => '&#1094;&#1080;&#1088;&#1080;&#1083;&#1080;&#1094;.txt'
	);

	$zip = new ZipArchive();
	$id = 'zipfile_' . time();
	$filename = "$id.zip";
	if ($zip->open($filename, ZIPARCHIVE::CREATE)) {
		foreach ($files as $src => $name) {
			$zip->addFile($src, $name);
		}
	}
	$zip->close();
	echo $id;
?>

Expected result:
----------------
You'll get name of the created ZIP file. If you open/download that ZIP file, all the files that are compressed should have proper filename.

Actual result:
--------------
Only name of the first file is interpreted correctly. All others, which are UTF-8 encoded, are renamed with some strange characters.