Log Message:
Updated shared-mime-info to 1.8.

shared-mime-info 1.8 (2016-12-05)
* Add Flatpak-related mime-types
* Add mime-type for a number of Thomson-related disk (and cassette) images
* Add many audio and video mime-type aliases as used in VLC
* Add mime-type for pdf.lz files
* Write the correct length for literal and glob lists to the cache
* Build fixes