base-files: create /var/tmp on boot

FHS mandates presence of /var/tmp on compliant systems.

The lack of /var/tmp was discovered when using MIT Kerberos libraries
which default to that location for storing credentials cache.

Signed-off-by: Paul Fertser <fercerpav@gmail.com>

SVN-Revision: 47219

package/base-files/files/etc/init.d/boot

@@ -26,6 +26,7 @@ boot() {
 	mkdir -p /var/log
 	mkdir -p /var/lock
 	mkdir -p /var/state
+	mkdir -p /var/tmp
 	mkdir -p /tmp/.uci
 	chmod 0700 /tmp/.uci
 	mkdir -p /tmp/.jail