trunk: switchboard recipe: add patch for Switchboard lexicon to fix a few wrong prons (has essentially no effect on WER but best to fix things.  Not adding RESULTS file yet.)

git-svn-id: https://svn.code.sf.net/p/kaldi/code/trunk@4722 5e6a8d80-dfce-4ca6-a32a-6e07a63d50c8