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).

Regarding the build targets, this is the original state of Manibuilder
as it was used to build-test `flashrom-1.0`. Some fixes to the frame-
work were applied, but fixups for the targets will be done in separate
patches to maintain their original state for reference.

Change-Id: I60863a5c7d70dde71486fccb66cb59b30ba4d982
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/23005
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

util/manibuilder/Dockerfile.djgpp

@@ -0,0 +1,29 @@
+FROM anibali/djgpp:6.1.0
+
+USER root
+RUN \
+	userdel appuser && \
+	useradd -p locked -m mani && \
+	zypper -q install -y tar make git ccache
+
+USER mani
+RUN cd && \
+	mkdir .ccache && chown mani:users .ccache && \
+	git clone https://review.coreboot.org/flashrom.git && \
+	git clone https://git.kernel.org/pub/scm/utils/pciutils/pciutils.git && \
+	cd pciutils && \
+		git checkout v3.5.6 && \
+		curl https://flashrom.org/images/6/6a/Pciutils-3.5.6.patch.gz | zcat | git apply && \
+		make ZLIB=no DNS=no HOST=i386-djgpp-djgpp \
+			CROSS_COMPILE=i586-pc-msdosdjgpp- \
+			PREFIX=/ DESTDIR=$PWD/../ \
+			STRIP="--strip-program=i586-pc-msdosdjgpp-strip -s" \
+			install install-lib && \
+		cd ../ && \
+	curl https://flashrom.org/images/3/3d/Libgetopt.tar.gz | zcat | tar x && \
+	cd libgetopt && \
+		make && cp libgetopt.a ../lib/ && cp getopt.h ../include/
+
+ENV DEVSHELL /bin/bash
+COPY mani-wrapper.sh /home/mani/
+ENTRYPOINT ["/bin/sh", "/home/mani/mani-wrapper.sh"]