Fix PATH setting in Windows C++ TFLite tests

ci_scripts/cppwin_tflite-tests.sh

@@ -12,11 +12,11 @@ set_ldc_sample_filename "${bitrate}"
 model_source=${DEEPSPEECH_TEST_MODEL//.pb/.tflite}
 model_name=$(basename "${model_source}")
 model_name_mmap=$(basename "${model_source}")
-export DATA_TMP_DIR=${TASKCLUSTER_TMP_DIR}
+export DATA_TMP_DIR=${CI_TMP_DIR}
 
-download_material "${TASKCLUSTER_TMP_DIR}/ds"
+download_material "${CI_TMP_DIR}/ds"
 
-export PATH=${TASKCLUSTER_TMP_DIR}/ds/:$PATH
+export PATH=${CI_TMP_DIR}/ds/:$PATH
 
 check_versions