imagebuilder: remove postinst files before generating image

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

Backport of r42339

git-svn-id: svn://svn.openwrt.org/openwrt/branches/barrier_breaker@42340 3c298f89-4303-0410-b956-a3cf2f4a3e73
nettle: disable mips16 support to improve performance

Signed-off-by: Nikos Mavrogiannopoulos <nmav@gnutls.org>

Backport of r42341

git-svn-id: svn://svn.openwrt.org/openwrt/branches/barrier_breaker@42342 3c298f89-4303-0410-b956-a3cf2f4a3e73
netifd: update to the latest version, fixes proto-shell teardown after renew

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

Backport of r42344

git-svn-id: svn://svn.openwrt.org/openwrt/branches/barrier_breaker@42346 3c298f89-4303-0410-b956-a3cf2f4a3e73
netifd: update to the latest version, adds interface cleanup fixes

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

Backport of r42345

git-svn-id: svn://svn.openwrt.org/openwrt/branches/barrier_breaker@42347 3c298f89-4303-0410-b956-a3cf2f4a3e73
Merge branch 'master' of git://git.openwrt.org/14.07/openwrt