Merge remote-tracking branch 'remotes/rth/tags/pull-hppa-20170206' into staging

Misc hppa fixes.

# gpg: Signature made Tue 07 Feb 2017 02:28:40 GMT
# gpg:                using RSA key 0xAD1270CC4DD0279B
# gpg: Good signature from "Richard Henderson <rth7680@gmail.com>"
# gpg:                 aka "Richard Henderson <rth@redhat.com>"
# gpg:                 aka "Richard Henderson <rth@twiddle.net>"
# Primary key fingerprint: 9CB1 8DDA F8E8 49AD 2AFC  16A4 AD12 70CC 4DD0 279B

* remotes/rth/tags/pull-hppa-20170206:
  target/hppa: Fix gdb_write_register
  target/hppa: Tidy do_cbranch
  linux-user: define correct UTS machine name for hppa
  linux-user: fix "apt-get update" on linux-user hppa
  linux-user: add hppa magic numbers in qemu-binfmt-conf.sh

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>