toolchain/musl: add parenthesis to the __ARE_4_EQUAL macro

Fixes warnings exposed by netifd while using IN6_ARE_ADDR_EQUAL turned
into errors.

Signed-off-by: Florian Fainelli <florian@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@35404 3c298f89-4303-0410-b956-a3cf2f4a3e73
[buildroot] allow using sstrip with musl

There was no particular reason for it to be disabled so allow it.

Signed-off-by: Florian Fainelli <florian@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@35405 3c298f89-4303-0410-b956-a3cf2f4a3e73
toolchain/gcc: fix the mips64 linker path to be more musl conforming

musl libc does not use /lib32 or /lib64 directories, just /lib

Signed-off-by: Florian Fainelli <florian@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@35406 3c298f89-4303-0410-b956-a3cf2f4a3e73