fix test_rtf, test=doc

tests/unit/cli/cacu_rtf_by_aishell.sh

 #!/bin/bash
 
+source path.sh
 stage=-1
 stop_stage=100
 MAIN_ROOT=../../..

tests/unit/cli/path.sh

+export MAIN_ROOT=`realpath ${PWD}/../../../`
+
+export PATH=${MAIN_ROOT}:${MAIN_ROOT}/utils:${PATH}
+export LC_ALL=C
+
+export PYTHONDONTWRITEBYTECODE=1
+# Use UTF-8 in Python to avoid UnicodeDecodeError when LC_ALL=C
+export PYTHONIOENCODING=UTF-8
+export PYTHONPATH=${MAIN_ROOT}:${PYTHONPATH}
+
+export LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:/usr/local/lib/