Change in flashrom[master]: Add Manibuilder

[Angel Pons (Code Review)]

Attention is currently required from: Nico Huber, David Hendricks.
Angel Pons has uploaded a new patch set (#10) to the change originally created by Nico Huber. ( https://review.coreboot.org/c/flashrom/+/23005 )

Change subject: Add Manibuilder
......................................................................

Add Manibuilder

Add a set of Dockerfiles for build testing. If you have an x86 machine
and ~20GiB free disk space, run `make register` and `make -jxx` in
util/manibuilder and go eat some pizza. The former runs a privileged
docker container to set binfmt_misc up for qemu (read the code, don't
trust it).

Change-Id: I60863a5c7d70dde71486fccb66cb59b30ba4d982
Signed-off-by: Nico Huber 
---
A util/manibuilder/Dockerfile.alpine
A util/manibuilder/Dockerfile.anita
A util/manibuilder/Dockerfile.centos
A util/manibuilder/Dockerfile.debian-debootstrap
A util/manibuilder/Dockerfile.djgpp
A util/manibuilder/Dockerfile.fedora
A util/manibuilder/Dockerfile.qemu-user-static
A util/manibuilder/Dockerfile.ubuntu-debootstrap
A util/manibuilder/Makefile
A util/manibuilder/Makefile.targets
A util/manibuilder/README.md
A util/manibuilder/anita-wrapper.sh
A util/manibuilder/mani-wrapper.sh
13 files changed, 470 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/flashrom refs/changes/05/23005/10