iproute2 includes "sanitized" linux kernel headers, which work fine for uClibc, however
with musl there is some header conflict, principally some ipv6 structure redefinition. This
patch removes <linux/in6.h> from include/linux/if_bridge.h to solve the problem.
Signed-off-by: Russell Senior <russell@personaltelco.net>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@43992 3c298f89-4303-0410-b956-a3cf2f4a3e73