Ruby 1.9.2 compat: Use File#expand_path for require path because "." will not...

Ruby 1.9.2 compat: Use File#expand_path for require path because "." will not be included in LOAD_PATH since Ruby 1.9.2 [#2921 state:resolved]
Signed-off-by: NYehuda Katz <wycats@gmail.com>

railties/bin/about

 #!/usr/bin/env ruby
-require File.dirname(__FILE__) + '/../config/boot'
+require File.expand_path('../../config/boot',  __FILE__)
 $LOAD_PATH.unshift "#{RAILTIES_PATH}/builtin/rails_info"
-require 'commands/about'
\ No newline at end of file
+require 'commands/about'

railties/bin/console

 #!/usr/bin/env ruby
-require File.dirname(__FILE__) + '/../config/boot'
+require File.expand_path('../../config/boot',  __FILE__)
 require 'commands/console'

railties/bin/dbconsole

 #!/usr/bin/env ruby
-require File.dirname(__FILE__) + '/../config/boot'
+require File.expand_path('../../config/boot',  __FILE__)
 require 'commands/dbconsole'

railties/bin/destroy

 #!/usr/bin/env ruby
-require File.dirname(__FILE__) + '/../config/boot'
+require File.expand_path('../../config/boot',  __FILE__)
 require 'commands/destroy'

railties/bin/generate

 #!/usr/bin/env ruby
-require File.dirname(__FILE__) + '/../config/boot'
+require File.expand_path('../../config/boot',  __FILE__)
 require 'commands/generate'

railties/bin/performance/benchmarker

 #!/usr/bin/env ruby
-require File.dirname(__FILE__) + '/../../config/boot'
+require File.expand_path('../../../config/boot',  __FILE__)
 require 'commands/performance/benchmarker'

railties/bin/performance/profiler

 #!/usr/bin/env ruby
-require File.dirname(__FILE__) + '/../../config/boot'
+require File.expand_path('../../../config/boot',  __FILE__)
 require 'commands/performance/profiler'

railties/bin/plugin

 #!/usr/bin/env ruby
-require File.dirname(__FILE__) + '/../config/boot'
+require File.expand_path('../../config/boot',  __FILE__)
 require 'commands/plugin'

railties/bin/runner

 #!/usr/bin/env ruby
-require File.dirname(__FILE__) + '/../config/boot'
+require File.expand_path('../../config/boot',  __FILE__)
 require 'commands/runner'

railties/bin/server

 #!/usr/bin/env ruby
-require File.dirname(__FILE__) + '/../config/boot'
+require File.expand_path('../../config/boot',  __FILE__)
 require 'commands/server'