Merge remote-tracking branch 'remotes/rth/tags/pull-tcg-20200717' into staging

Merge remote-tracking branch 'remotes/rth/tags/pull-tcg-20200717' into staging

Fix vector min/max fallback expansion
Fix singlestep from exception and interrupt

# gpg: Signature made Fri 17 Jul 2020 19:13:32 BST
# gpg:                using RSA key 7A481E78868B4DB6A85A05C064DF38E8AF7E215F
# gpg:                issuer "richard.henderson@linaro.org"
# gpg: Good signature from "Richard Henderson <richard.henderson@linaro.org>" [full]
# Primary key fingerprint: 7A48 1E78 868B 4DB6 A85A  05C0 64DF 38E8 AF7E 215F

* remotes/rth/tags/pull-tcg-20200717:
  tcg/cpu-exec: precise single-stepping after an interrupt
  tcg/cpu-exec: precise single-stepping after an exception
  tcg: Save/restore vecop_list around minmax fallback

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