build: fix the strip default for musl

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@35389 3c298f89-4303-0410-b956-a3cf2f4a3e73
kernel: update linux 3.7 to 3.7.5

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@35390 3c298f89-4303-0410-b956-a3cf2f4a3e73