fdo#56832 Explicitly mention Ogg Audio and Video
fdo#56832 Explicitly mention Ogg Audio and Video

.ogx is also a valid extension, see http://wiki.xiph.org/MIME_Types_and_File_Extensions

Change-Id: Ieb5f3b7016b58beaf915673181369530a3d0709e
Reviewed-on: https://gerrit.libreoffice.org/3609
Reviewed-by: Tor Lillqvist <a9ff1a38c0d094d92725714af3aa7948469a0905@iki.fi>
Tested-by: Tor Lillqvist <a9ff1a38c0d094d92725714af3aa7948469a0905@iki.fi>

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core