Merge remote-tracking branch 'remotes/vivier2/tags/trivial-branch-pull-request' into...

.gitignore updates for v4.0

# gpg: Signature made Thu 14 Mar 2019 15:04:29 GMT
# gpg:                using RSA key F30C38BD3F2FBE3C
# gpg: Good signature from "Laurent Vivier <lvivier@redhat.com>" [full]
# gpg:                 aka "Laurent Vivier <laurent@vivier.eu>" [full]
# gpg:                 aka "Laurent Vivier (Red Hat) <lvivier@redhat.com>" [full]
# Primary key fingerprint: CD2F 75DD C8E3 A4DC 2E4F  5173 F30C 38BD 3F2F BE3C

* remotes/vivier2/tags/trivial-branch-pull-request:
  tests/.gitignore: ignore test-qapi-emit-events.[ch] for in-tree builds
  .gitignore: ignore docs/built created for in-tree builds
  maint: Ignore built elf2dmp

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