Use local time (Thanks Mike)

Makefile

@@ -25,7 +25,7 @@ TOPDIR=./
 CONFIG_CONFIG_IN=Config.in
 CONFIG_DEFCONFIG=.defconfig
 CONFIG=package/config
-DATE:=$(shell date -u +%Y%m%d)
+DATE:=$(shell date +%Y%m%d)
 
 noconfig_targets:=menuconfig config oldconfig randconfig \
 	defconfig allyesconfig allnoconfig release tags \