rygel: Update to stable version 0.20.3

This update fixes the following issues with rygel:
- Update to version 0.20.3:
+ Allow building against Tracker 0.18.
+ Server:
* Add more work-arounds for Samsung TVs.
* Add more hacks for devices doing full seek requests.
+ Bugs fixed: bgo#715089.
+ Updated translations.
- bnc#864121, bgo#724215: make the GstLaunch pipelines in rygel.conf work with gst-1.0

Fixed bugs
bnc#864121
Pipelines in rygel.conf dont work with gstreamer-1.0
Selected Binaries
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