gst1-libav: security bump to version 1.10.4

It updates to the ffmpeg 3.2.4 codebase, fixing several security bugs.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/gstreamer1/gst1-libav/gst1-libav.hash

@@ -1,2 +1,2 @@
-# From http://gstreamer.freedesktop.org/src/gst-libav/gst-libav-1.10.3.tar.xz.sha256sum
-sha256 9a6bc165b1862b18b98d9f1755c43806e4839a80f69ec7ea9a2dab61b65752a9  gst-libav-1.10.3.tar.xz
+# From http://gstreamer.freedesktop.org/src/gst-libav/gst-libav-1.10.4.tar.xz.sha256sum
+sha256 6ca0feca75e3d48315e07f20ec37cf6260ed1e9dde58df355febd5016246268b  gst-libav-1.10.4.tar.xz

package/gstreamer1/gst1-libav/gst1-libav.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-GST1_LIBAV_VERSION = 1.10.3
+GST1_LIBAV_VERSION = 1.10.4
 GST1_LIBAV_SOURCE = gst-libav-$(GST1_LIBAV_VERSION).tar.xz
 GST1_LIBAV_SITE = https://gstreamer.freedesktop.org/src/gst-libav
 GST1_LIBAV_CONF_OPTS = --with-system-libav