Merge pull request #750 from jtrmal/iban_path_fix

iban recipe -- adding path.sh that was accidentally removed today

egs/iban/s5/path.sh

@@ -1,10 +1,6 @@
-#!/bin/bash
-
 export KALDI_ROOT=`pwd`/../../..
-. $KALDI_ROOT/tools/config/common_path.sh
-
+[ -f $KALDI_ROOT/tools/env.sh ] && . $KALDI_ROOT/tools/env.sh
 export PATH=$PWD/utils/:$KALDI_ROOT/tools/openfst/bin:$PWD:$PATH
-
-. $KALDI_ROOT/tools/env.sh
+[ ! -f $KALDI_ROOT/tools/config/common_path.sh ] && echo >&2 "The standard file $KALDI_ROOT/tools/config/common_path.sh is not present -> Exit!" && exit 1
+. $KALDI_ROOT/tools/config/common_path.sh
 export LC_ALL=C
-