Fix potential parallel test conflicts

Both tests call `create_files()` with the same `$name_prefix` what
might clash.

Co-authored-by: Gina Peter Banyard <[email protected]>

Closes phpGH-16103.

Author: cmb69

ext/standard/tests/file/file_get_contents_error.phpt

@@ -13,17 +13,17 @@ include($file_path."/file.inc");
 echo "\n-- Testing with  Non-existing file --\n";
 print( file_get_contents("/no/such/file/or/dir") );
 
-create_files($file_path, 1, "text", 0755, 100, "w", "file", 1, "byte");
+create_files($file_path, 1, "text", 0755, 100, "w", "file_get_contents_error", 1, "byte");
 $file_handle = fopen($file_path."/file_put_contents_error.tmp", "w");
 
 echo "\n-- Testing for invalid negative maxlen values --\n";
 try {
-    file_get_contents($file_path."/file1.tmp", FALSE, $file_handle, 0, -5);
+    file_get_contents($file_path."/file_get_contents_error1.tmp", FALSE, $file_handle, 0, -5);
 } catch (ValueError $exception) {
     echo $exception->getMessage() . "\n";
 }
 
-delete_files($file_path, 1);
+delete_files($file_path, 1, "file_get_contents_error", 1);
 fclose($file_handle);
 unlink($file_path."/file_put_contents_error.tmp");