package ffmpeg: add libnut dependency

src/ffmpeg.mk

@@ -9,7 +9,7 @@ $(PKG)_SUBDIR   := $(PKG)-$($(PKG)_VERSION)
 $(PKG)_FILE     := $(PKG)-$($(PKG)_VERSION).tar.bz2
 $(PKG)_URL      := http://www.ffmpeg.org/releases/$($(PKG)_FILE)
 $(PKG)_URL_2    := http://launchpad.net/ffmpeg/main/$($(PKG)_VERSION)/+download/$($(PKG)_FILE)
-$(PKG)_DEPS     := gcc bzip2 lame libass libvpx opencore-amr opus sdl speex theora vo-aacenc vo-amrwbenc vorbis x264 xvidcore zlib
+$(PKG)_DEPS     := gcc bzip2 lame libass libnut libvpx opencore-amr opus sdl speex theora vo-aacenc vo-amrwbenc vorbis x264 xvidcore zlib
 
 define $(PKG)_UPDATE
     $(WGET) -q -O- 'http://www.ffmpeg.org/download.html' | \