add ffmpeg

Signed-off-by: weishanshan1084 <weishanshan1084@phytium.com.cn>

board/phytium/common/ubuntu-additional_packages_list

@@ -7,5 +7,5 @@ additional_desktop_packages_list="network-manager-gnome"
 additional_base_packages_list="net-tools iputils-ping gcc g++ vim make autoconf automake libtool pkg-config bison bc flex libssl-dev openssh-server python-is-python3 \
 libgstreamer1.0-0 gstreamer1.0-plugins-base gstreamer1.0-plugins-good gstreamer1.0-plugins-bad gstreamer1.0-plugins-ugly gstreamer1.0-libav gstreamer1.0-tools \
 gstreamer1.0-x gstreamer1.0-alsa gstreamer1.0-gl gstreamer1.0-gtk3 gstreamer1.0-pulseaudio \
-dkms initramfs-tools debhelper libgles-dev libexpat1-dev libglvnd-dev \
+dkms initramfs-tools debhelper libgles-dev libexpat1-dev libglvnd-dev ffmpeg \
 network-manager wpasupplicant wireless-tools parted locales"