(BABEL) some more fixes to the make_ffv.sh script -- the segments dropped during

extracting the segments (extract-segments) must be omitted from the other files
used for ffv features generation


git-svn-id: https://svn.code.sf.net/p/kaldi/code/trunk@2975 5e6a8d80-dfce-4ca6-a32a-6e07a63d50c8