enhance(scripts,packages.yml): sync upload steps

In commit ca2e7bcf73 ("ci(packages): Do not unconditionally publish
repo when no changes are made to other repos") the upload step to
fosshost was updated, but not the one for grimler.se.  Sync the upload
steps so that they are nearly identical again.

.github/workflows/packages.yml

@@ -299,7 +299,6 @@ jobs:
 
         source scripts/aptly_api.sh
 
-
         for repo in $(jq --raw-output 'keys | .[]' repo.json); do
           export REPOSITORY_NAME=$(jq --raw-output '.["'$repo'"].name' repo.json)
           export REPOSITORY_DISTRIBUTION=$(jq --raw-output '.["'$repo'"].distribution' repo.json)
@@ -307,6 +306,8 @@ jobs:
           # Upload file to temporary directory.
           uploaded_files=false
           shopt -s nullglob
+
+          if [ -f debs/built_${REPOSITORY_NAME}_packages.txt ]; then
             for filename in $(cat debs/built_${REPOSITORY_NAME}_packages.txt | sed -E 's/(..*)/debs\/\1_\*.deb debs\/\1-static_\*.deb/g'); do
               if ! aptly_upload_file "$filename"; then
                 exit 1
@@ -331,4 +332,5 @@ jobs:
               #   exit 1
               # fi
             fi
+          fi
         done