hg: openjfx/10-dev/rt: 8181922: Provide media support for libav version 57

[alexander.matveev at oracle.com]

Changeset: 5531fbd393a6
Author:    almatvee
Date:      2017-10-04 13:13 -0700
URL:       http://hg.openjdk.java.net/openjfx/10-dev/rt/rev/5531fbd393a6

8181922: Provide media support for libav version 57
Reviewed-by: kcr, ddehaven

! modules/javafx.media/src/main/native/gstreamer/gstreamer-lite/gstreamer/gst/gstregistry.c