[BUGFIX] Name of the static typoscripts

Fixed StaticTypoScriptLoader generating wrong TypoScript Name
Having an Extension with multiple TypoScript folders will
now generate correct names.

Change-Id: I1abaadba199f7b4120603bcb4634d1added9e698
Reviewed-on: http://review.typo3.org/32970
Reviewed-by: Tim Lochmüller <tim@fruit-lab.de>
Tested-by: Tim Lochmüller <tim@fruit-lab.de>