Merge tag 'linux-user-fix-gupnp-pull-request' of https://github.com/hdeller/qemu-hppa into staging

linux-user: Add support for various missing netlink sockopt entries

Add missing sockopt calls and thus fix building the debian gupnp package in a chroot.

This fixes debian bug report:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1044651

Signed-off-by: Helge Deller <deller@gmx.de>

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* tag 'linux-user-fix-gupnp-pull-request' of https://github.com/hdeller/qemu-hppa:
  linux-user: netlink: Add missing QEMU_IFLA entries
  linux-user: netlink: add netlink neighbour emulation
  linux-user: netlink: Add emulation of IP_MULTICAST_IF
  linux-user: netlink: Add IP_PKTINFO cmsg parsing
  linux-user: Use unique error messages for cmsg parsing
  linux-user: netlink: Add missing IFA_PROTO to host_to_target_data_addr_rtattr()

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>