Add system test name to "file not removed" info

(cherry picked from commit 10bf725ee2)

bin/tests/system/run.sh

@@ -313,9 +313,9 @@ else
        ( cd $systest && $SHELL clean.sh "$@" )
        if test -d ../../../.git; then
            git status -su --ignored "${systest}" 2>/dev/null | \
-           sed -n -e 's|^?? \(.*\)|I:file \1 not removed|p' \
-           -e 's|^!! \(.*/named.run\)$|I:file \1 not removed|p' \
-           -e 's|^!! \(.*/named.memstats\)$|I:file \1 not removed|p'
+           sed -n -e 's|^?? \(.*\)|I:'${systest}':file \1 not removed|p' \
+           -e 's|^!! \(.*/named.run\)$|I:'${systest}':file \1 not removed|p' \
+           -e 's|^!! \(.*/named.memstats\)$|I:'${systest}':file \1 not removed|p'
        fi
     fi
 fi