busybox: turn on BUSYBOX_DEFAULT_FEATURE_SH_NOFORK to slightly improve performance

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@43348 3c298f89-4303-0410-b956-a3cf2f4a3e73
lzo: disable unaligned access for everything except x86

Fixes issues on ARM

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@43349 3c298f89-4303-0410-b956-a3cf2f4a3e73
libubox: update to the latest version, adds some jshn optimizations

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@43350 3c298f89-4303-0410-b956-a3cf2f4a3e73