- Adjustments post security review (boo#960173):
+ Add libcap-devel BuildRequires: rely on capabilities instead of
flagging the binary suid.
+ Pass --with-ptp-helper-permissions=capabilities to configure:
ensure there is no auto-fallback to attempting to install the
binary suid in case capabilities would not work.

- Update to version 1.6.2:
+ Crashes in gst-libav with sinks that did not provide a buffer
pool but supported video metadata were fixed. This affected
d3dvideosink and some 3rd party sinks. Also related fixes for
crashes when a downstream buffer pool failed allocation.
+ Big GL performance improvement on iOS by a factor of 2 by using
Apple's sync extension.
+ Deadlocks in the DirectSound elements on Windows, and the
behaviour of its mute property were fixed.
+ The Direct3D video sink does not crash anymore when minimizing
the window.
+ The library soname generation on Android >= 6.0 was fixed,
which previously caused GStreamer to fail to load there.
+ File related elements have large-file (>2GB) support on Android
now.
+ gst-libav was updated to ffmpeg 2.8.3.
+ Deserialization of custom events in the GDP depayloader was
fixed.
+ Missing OpenGL context initialization in the Qt/QML video sink
was fixed in certain situations.
+ Interoperability with some broken RTSP servers using HTTP
tunnel was improved.
+ Various compilation fixes for Windows.