[actions/packaging] checkout before uploading

This is required on dispatch package-release

Author: gergondet

.github/workflows/package.yml

@@ -146,6 +146,9 @@ jobs:
           arch: i386
     runs-on: ubuntu-18.04
     steps:
+    - uses: actions/checkout@v2
+      with:
+        submodules: recursive
     - name: Choose extra mirror
       run: |
         # We upload in all conditions except when building on PR or branch other than master

.github/workflows/sources/package.yml

@@ -157,6 +157,9 @@ jobs:
       matrix: *package-matrix
     runs-on: ubuntu-18.04
     steps:
+    - uses: actions/checkout@v2
+      with:
+        submodules: recursive
     - name: Set upload parameters
       <<: *choose-extra-mirror
     - name: Download packages