bugfix: ffmpeg needs absolute names

Author: banderlog

build/ffmpeg/ffmpeg_setup.sh

@@ -1,8 +1,10 @@
 #!/bin/bash
 # Maybe, prefix should contain full absolute path
 # it will jelp to generate proper .pc files
+PATH_TO_SCRIPT=`dirname $(realpath $0)`
+
 ../../ffmpeg/configure \
---prefix=./binaries \
+--prefix=$PATH_TO_SCRIPT/binaries \
 --disable-programs \
 --disable-avdevice \
 --disable-postproc \