changed grab_config to class method

git-svn-id: http://unity.svn.sourceforge.net/svnroot/unity/trunk@31 e7d17a6e-8845-0410-bbbc-c8efb4fdad7e

auto/generate_test_runner.rb

 
 class UnityTestRunnerGenerator
 
-  def grab_config(config_file)
+  def self.grab_config(config_file)
     includes = []
     options = {}
     unless (config_file.nil? or config_file.empty?)
@@ -203,7 +203,7 @@ if ($0 == __FILE__)
       options[$1.to_sym] = 1
       true
     elsif (arg =~ /(\w+\.yml)/)
-      includes, options = grab_config($1)
+      includes, options = UnityTestRunnerGenerator::grab_config($1)
       true
     else
       false