D12028: taglibextractortest: Add test for files with empty metadata

[Michael Heidelbach]

michaelh edited the summary of this revision.

REPOSITORY
  R286 KFileMetaData

REVISION DETAIL
  https://phabricator.kde.org/D12028

To: michaelh, mgallien, #baloo, #frameworks
Cc: astippich, ashaposhnikov, michaelh, spoorun, ngraham, bruns, alexeymin