backflip-from-tsv: Fix "on-going" support, add support for "stack-not-yet".

Change-Id: If15342ba80cbb7b5f3b975c99b6105828dc0bee6
diff --git a/backflip-from-tsv b/backflip-from-tsv
index f7653df..a0ef2cf 100755
--- a/backflip-from-tsv
+++ b/backflip-from-tsv
@@ -87,6 +87,12 @@
 		[ $verbose ] && echo "$svn will come from branch merge, skipping (fsf rev=$fsf)"
 		continue
 	    fi
+	    case $status in
+		on*going)
+		    [ $verbose ] && echo "$svn backport already on-going"
+		    continue
+		    ;;
+	    esac
 	    case $linaro in
 		"")
 		    [ $verbose ] && echo "$svn needs to be backported, alone"
@@ -96,7 +102,7 @@
 		    [$verbose ] && echo "$svn backported automatically, skipping"
 		    continue
 		    ;;
-		no*)
+		no)
 		    [ $verbose ] && echo "$svn not wanted, skipping"
 		    continue
 		    ;;
@@ -127,8 +133,8 @@
 		    done < /tmp/backflip-stack.$$
 		    continue # FIXME
 		    ;;
-		on-going|"on going")
-		    [ $verbose ] && echo "$svn backport on-going"
+		*not*yet)
+		    [ $verbose ] && echo "$svn is part of a stack which is not ready yet"
 		    continue
 		    ;;
 		"via merge")