component/ragel: Fix ragel url

The old address is no more:

    $ wget http://www.complang.org/ragel/ragel-6.8.tar.gz
    --2015-06-12 12:22:55--  http://www.complang.org/ragel/ragel-6.8.tar.gz
    Resolving www.complang.org (www.complang.org)... 192.155.89.46
    Connecting to www.complang.org (www.complang.org)|192.155.89.46|:80... connected.
    HTTP request sent, awaiting response... 404 Not Found
    2015-06-12 12:22:55 ERROR 404: Not Found.

because Ragel project moved to http://www.colm.net/open-source/ragel/

Adjust the download url properly.

/cc @cedric.leninivin
/reviewed-by: TrustMe

component/ragel/buildout.cfg

@@ -8,7 +8,7 @@ parts =
 
 [ragel]
 recipe = slapos.recipe.cmmi
-url = http://www.complang.org/ragel/ragel-6.8.tar.gz
+url = http://www.colm.net/files/ragel/ragel-6.8.tar.gz
 md5sum = 1bb39745ac23da449019f9f2cb4b0d01
 configure-options =
   --prefix=${buildout:parts-directory}/${:_buildout_section_name_}