Fix test conflict between chmod_variation2 and file_variation5

Both used "somelink".
See https://github.com/php/php-src/actions/runs/16427526464/job/46421461376

Closes GH-19208.

Author: nielsdos

ext/standard/tests/file/chmod_variation2.phpt

@@ -34,7 +34,7 @@ clearstatcache();
 printf("%o\n", fileperms($filepath) & PERMISSIONS_MASK);
 
 echo "\nchmod() on a linked file\n";
-$linkname = "somelink";
+$linkname = "somelink2";
 var_dump(symlink($filepath, $linkname));
 var_dump(chmod($filepath, 0777));
 var_dump(chmod($linkname, 0755));

ext/standard/tests/file/file_variation5.phpt

@@ -27,7 +27,7 @@ echo "\nfile() on a path containing .. with invalid directories\n";
 var_dump(file("./$test_dirname/bad_dir/../../$filename"));
 
 echo "\nfile() on a linked file\n";
-$linkname = "somelink";
+$linkname = "somelink5";
 var_dump(symlink($filepath, $linkname));
 var_dump(file($linkname));
 var_dump(unlink($linkname));