Skip test depending on fork if fork is not available

Author: eregon

test/test_syslog.rb

@@ -117,6 +117,7 @@ def syslog_line_regex(ident, message)
   end
 
   def test_log
+    return unless Process.respond_to?(:fork)
     IO.pipe {|stderr|
       pid = fork {
         stderr[0].close