Merge remote-tracking branch 'remotes/rth/tags/tcg-next-20150505' into staging

Merge remote-tracking branch 'remotes/rth/tags/tcg-next-20150505' into staging

size reduction merge

# gpg: Signature made Wed May  6 00:21:43 2015 BST using RSA key ID 4DD0279B
# gpg: Good signature from "Richard Henderson <rth7680@gmail.com>"
# gpg:                 aka "Richard Henderson <rth@redhat.com>"
# gpg:                 aka "Richard Henderson <rth@twiddle.net>"

* remotes/rth/tags/tcg-next-20150505:
  tcg: optimise memory layout of TCGTemp

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