[l10n] Updated Italian translation.
Updated Hungarian translation
Updated Slovenian translation
build: Support building with tracker-1.0

https://bugzilla.gnome.org/show_bug.cgi?id=724820
Updated Galician translations
Updated Galician translations
Updated Norwegian bokmål translation
Updated Korean translation
Prepare 0.21.5
Updated Latvian translation
Updated Chinese (China) translation
Updated Traditional Chinese translation(Hong Kong and Taiwan)
Updated Russian translation
Updated Polish translation
renderer-gst: Fix two criticals on startup

Signed-off-by: Jens Georg <mail@jensge.org>
Updated Ukrainian translation
Updated French translation
Finnish translation update by Jiri Grönroos
Updated Indonesian translation
build: Replace another cp -d

Signed-off-by: Jens Georg <mail@jensge.org>