[Review] Request from 'schubi2' @ 'yast/yast-bootloader/review_140730_error_popup'

Please review the following changes:
  * 894be78 packaging
  * b83225f syntactical error

this will break existing translation...in fact I want to use 
```
Popup.Error(_("Unsupported bootloader '%s'. Adapt your AutoYaST profile accordingly.") %
 exp["loader_type"]))
```
which is native ruby sformat