build: fix patchup logic only running on one platform (#43656)

Co-authored-by: trop[bot] <37223003+trop[bot]@users.noreply.github.com>
Co-authored-by: Shelley Vohr <shelley.vohr@gmail.com>

.github/actions/checkout/action.yml

@@ -75,7 +75,7 @@ runs:
         "$GITHUB_SERVER_URL/$GITHUB_REPOSITORY"
 
       ELECTRON_USE_THREE_WAY_MERGE_FOR_PATCHES=1 gclient sync --with_branch_heads --with_tags -vvvvv
-      if [ "${{ inputs.is-release }}" != "true" ]; then
+      if [ "${{ inputs.is-release }}" != "true" && -n "${{ env.PATCH_UP_APP_CREDS }}" ]; then
         # Re-export all the patches to check if there were changes.
         python3 src/electron/script/export_all_patches.py src/electron/patches/config.json
         cd src/electron

.github/workflows/build.yml

@@ -115,6 +115,7 @@ jobs:
         - /var/run/sas:/var/run/sas
     env:
       GCLIENT_EXTRA_ARGS: '--custom-var=checkout_arm=True --custom-var=checkout_arm64=True'
+      PATCH_UP_APP_CREDS: ${{ secrets.PATCH_UP_APP_CREDS }}
     outputs:
       build-image-sha: ${{ needs.setup.outputs.build-image-sha}}
     steps: