Made releng/manual_isojigdo remove .iso file after failed download

releng/manual_isojigdo

@@ -37,7 +37,7 @@ fi
 # check data dir, if any and after checking -x xorriso
 if [ -d "${GEN_DATA_DIR}" ]; then
  printf "\n${SELF}: directory %s exists!" ${GEN_DATA_DIR}
- printf "\n${SELF}: use '${SELF} -c' to remove.\n"
+ printf "\n${SELF}: use './${SELF} -c' to remove.\n"
  exit 1
 else
  mkdir "${GEN_DATA_DIR}"
@@ -91,9 +91,11 @@ if [ ! -f "${TMP_DATA_DIR}"/"${REMOTE_IMG}" ]; then
  printf "\n${SELF}: Downloading ${REMOTE_URL}/${REMOTE_IMG}\n"
  if wget -V >/dev/null 2>&1
  then
+   set +e
    wget --no-check-certificate -T20 -t3 \
         -O "${TMP_DATA_DIR}"/"${REMOTE_IMG}" "${REMOTE_URL}"/"${REMOTE_IMG}"
    WGET_RET="$?"
+   set -e
  elif fetch -T 20 -o "${TMP_DATA_DIR}"/"${REMOTE_IMG}" \
             "${REMOTE_URL}"/"${REMOTE_IMG}"
  then
@@ -110,6 +112,7 @@ if [ ! -f "${TMP_DATA_DIR}"/"${REMOTE_IMG}" ]; then
      ;;
      *)
       echo -e "\nFAIL : ${SELF} : wget returned code: $WGET_RET\n"
+      rm "${TMP_DATA_DIR}"/"${REMOTE_IMG}"
       cleanup
       exit 5
      ;;