ffmpeg: Update to 2.4.4

Drop fminf patch; fminf emulation is no longer included upstream.

Signed-off-by: Ian Leonard <antonlacon@gmail.com>
Merge pull request #660 from antonlacon/ffmpeg-2.4.x

ffmpeg: Update to 2.4.4
python: fix file conflict between python and python-base packages

Signed-off-by: Gergely Kiss <mail.gery@gmail.com>
Tested-by: Gergely Kiss <mail.gery@gmail.com>