Fix error out when the attachment is named tmp

Ex: https://bugs.archlinux.org/task/29604

snapshotter.sh

@@ -71,9 +71,9 @@ function download_attachment() {
     return
   fi
 
-  rm -fr "attachments/${1}/${2}/tmp"
-  mkdir -p "attachments/${1}/${2}/tmp"
-  cd "attachments/${1}/${2}/tmp"
+  rm -fr "attachments/${1}/tmp"
+  mkdir -p "attachments/${1}/"{tmp,${2}}
+  cd "attachments/${1}/tmp"
 
   local user_agent
   user_agent="albs ($(git rev-parse --short HEAD); https://gitlab.archlinux.org/archlinux/archlinux-bugs-snapshotter)"
@@ -81,14 +81,14 @@ function download_attachment() {
        --max-redirect 0 \
        --user-agent="${user_agent}" \
        --no-verbose \
-       "https://bugs.archlinux.org/?getfile=${2}" || { [[ ${?} = 3 ]] && echo "Error downloading attachment: ${2}" && cd ../../ && rmdir "${2}"{/tmp,} && cd ../../ && return; }
+       "https://bugs.archlinux.org/?getfile=${2}" || { [[ ${?} = 3 ]] && echo "Error downloading attachment: ${2}" && cd .. && rmdir tmp "${2}" && cd ../../ && return; }
   local files=(*)
   filename="${files[0]}"
 
   cd ..
-  mv "tmp/${filename}" .
+  mv "tmp/${filename}" "${2}"
   rmdir tmp
-  cd ../../../
+  cd ../../
 
   # https://unix.stackexchange.com/a/33005
   # shellcheck disable=SC2001