fix bpo suffix for buster

Author: t20100

build-deb.sh

@@ -219,7 +219,7 @@ build_deb_8_plus () {
     esac
 
     dch -v ${debianversion}-1 "upstream development build of ${project} ${version}"
-    dch -D ${debian_name}-backports -l~bpo${debian_version}+1 "${project} snapshot ${version} built for ${target_system}"
+    dch -D ${debian_name}-backports -l~bpo${debian_version}+ "${project} snapshot ${version} built for ${target_system}"
     #dch --bpo "${project} snapshot ${version} built for ${target_system}"
     dpkg-buildpackage -r
     rc=$?