ipvsadm build fails on macos due to libipvs Makefiles uses system
`ar` that is not compatible with the objectes generated by OpenWrt
GCC Toolchain.

This commit adds patch to allow ar redefining
This commit modifes an old patch (removing CC=gcc is not required
due to it is redefinable)

Signed-off-by: Sergey V. Lobanov <sergey@lobanov.in>