[Libreoffice] Cherry-pick request for fdo#39091, gstreamer urls with accented chars not playing back

[Caolán McNamara]

I suspect its merely the downshift to ASCII in avmedia

http://cgit.freedesktop.org/libreoffice/libs-core/commit/?id=6b211c4735b3965429e82dc100ef0cd0db810fed

is likely to fix it.

C.