firmware: fixes for changelog fetch

plist

@@ -535,6 +535,7 @@
 /usr/local/opnsense/scripts/filter/list_table.py
 /usr/local/opnsense/scripts/filter/list_tables.py
 /usr/local/opnsense/scripts/filter/pfinfo.py
+/usr/local/opnsense/scripts/firmware/changelog.sh
 /usr/local/opnsense/scripts/firmware/check.sh
 /usr/local/opnsense/scripts/firmware/hotfix.sh
 /usr/local/opnsense/scripts/firmware/install.sh

src/opnsense/scripts/firmware/changelog.sh

@@ -45,7 +45,7 @@ ${FETCH} -o ${WORKDIR}/changelog.txz.sig "${URL}.sig"
 ${FETCH} -o ${WORKDIR}/changelog.txz "${URL}"
 opnsense-verify -q ${WORKDIR}/changelog.txz
 
+rm -rf ${DESTDIR}
 mkdir -p ${DESTDIR}
-rm ${DESTDIR}/*
 
 tar -C ${DESTDIR} -xJf ${WORKDIR}/changelog.txz