fs/skeleton: make /var/lib/misc a symlink to /tmp

Similar to the other symlinks, so you can use E.G. dnsmasq with a read
only rootfs.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

diff --git a/fs/skeleton/var/lib/misc b/fs/skeleton/var/lib/misc
new file mode 120000 (symlink)
index 0000000..f1fde8c
--- /dev/null
+++ b/fs/skeleton/var/lib/misc
@@ -0,0 +1 @@
+../../tmp
\ No newline at end of file