File device-mapper-link of Package lvm2

Make sure 
  /dev/device-mapper
exists as a link to /dev/mapper/control

Resolves: bnc#724578
Signed-off-by: NeilBrown <neilb@suse.de>
---
 udev/10-dm.rules.in |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- LVM2.2.02.84.orig/udev/10-dm.rules.in
+++ LVM2.2.02.84/udev/10-dm.rules.in
@@ -14,7 +14,7 @@
 #   DM_SUSPENDED - suspended state of DM device (0 or 1)
 #   DM_UDEV_RULES_VSN - DM udev rules version
 
-KERNEL=="device-mapper", NAME="(DM_DIR)/control"
+KERNEL=="device-mapper", NAME="(DM_DIR)/control", SYMLINK+="device-mapper"
 
 SUBSYSTEM!="block", GOTO="dm_end"
 KERNEL!="dm-[0-9]*", GOTO="dm_end"