udev: use relative path when creating dev.tar

this effectively removes below warning:
  tar: removing leading '/' from member names

Signed-off-by: Kevin Tian <kevin.tian@intel.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/meta/packages/udev/files/udev-cache b/meta/packages/udev/files/udev-cache
index a4e91915bd..77bbda6f1b 100644
--- a/meta/packages/udev/files/udev-cache
+++ b/meta/packages/udev/files/udev-cache
@@ -14,7 +14,7 @@
 [ -x /sbin/udevd ] || exit 1
 
 if [ ! -e /etc/dev.tar ]; then
-        (cd /; tar cf /etc/dev.tar /dev)
+        (cd /; tar cf /etc/dev.tar dev)
 fi
 
 exit 0