resolvconf: remove /var/volatile/run/resolvconf/interface from package

resolvconf: remove /var/volatile/run/resolvconf/interface from package

- Remove /etc/resolvconf/run/interface from package as it actually uses
/etc/resolvconf/run/interface
- Create /var/run/resolvconf/interface on startup using
populate-volatiles.sh and tmpfiles.d for systemd
- Create symbolic link from /etc/resolvconf/run to /var/run/resolvconf

(From OE-Core rev: 619d78016be8d47691e3b2d218a6b855364541a3)

Signed-off-by: Jonathan Liu <net147@gmail.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>