Adding v2019.2 links to top-level readme

README.md

@@ -26,6 +26,10 @@ If you don't see a pipeline element or gstreamer plugin you're searching for in
 - [Xilinx Video Codec Unit Version Information](./xilinx/vcu/revisions.md)
 - [Xilinx Video Codec Unit Documentation](./xilinx/vcu/documentation.md)
 
+### v2019.2 Petalinux GStreamer Reference
+
+- [v2019.2 Petaliinux GStreamer Reference Index](./v2019.2/Readme.md)
+
 ### v2019.1 Petalinux GStreamer Reference
 
 - [v2019.1 Petaliinux GStreamer Reference Index](./v2019.1/Readme.md)