trunk: improvements to validate_lang.pl, and updates to...

trunk: improvements to validate_lang.pl, and updates to make_phone_bigram_lang.sh to properly validate output.

git-svn-id: https://svn.code.sf.net/p/kaldi/code/trunk@3368 5e6a8d80-dfce-4ca6-a32a-6e07a63d50c8