changelog: fix generation for runs after the first

changelog.sh

@@ -14,8 +14,9 @@ PKG_PREV="${CHANGELOG_DIR}/packages-latest.txt"
 BUILD_ID="$(cat .buildid)"
 CHANGELOG_FILE="${CHANGELOG_DIR}/${VERSION}.${BUILD_ID}.json"
 
-# Ensure rpmdb exists
-if [[ ! -f "${ROOTFS}/usr/lib/sysimage/rpm/Packages" ]]; then
+# Ensure rpmdb exists (Berkeley DB or SQLite)
+RPMDB="${ROOTFS}/usr/lib/sysimage/rpm"
+if [[ ! -f "${RPMDB}/Packages" && ! -f "${RPMDB}/Packages.db" && ! -f "${RPMDB}/rpmdb.sqlite" ]]; then
     echo "WARNING: rpmdb missing in rootfs (${ROOTFS})"
     echo "Skipping changelog generation."
     exit 0