mac80211: add support for verbose builds using V=sc

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

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@37597 3c298f89-4303-0410-b956-a3cf2f4a3e73
kernel: stop patching -funit-at-a-time into CFLAGS, it has no effect on recent compilers

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

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@37598 3c298f89-4303-0410-b956-a3cf2f4a3e73
tools: make padjffs2 depend on findutils

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

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@37599 3c298f89-4303-0410-b956-a3cf2f4a3e73
build: unify target independent optimization options

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

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@37600 3c298f89-4303-0410-b956-a3cf2f4a3e73