[buildsystem] add Dockerfile used for build container

docker/Dockerfile

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+FROM ubuntu:19.04
+RUN echo "Europe/Berlin" > /etc/timezone
+RUN apt-get update -q 
+RUN apt-get install tzdata
+RUN dpkg-reconfigure -f noninteractive tzdata
+RUN apt-get install -y -q \
+	wget \ 
+	git \ 
+	e2fsprogs  \ 
+	mtools \ 
+	build-essential \ 
+	gcc-arm-linux-gnueabi \ 
+	libglib2.0-dev \ 
+	zlib1g-dev \ 
+	dh-autoreconf \ 
+	flex \ 
+	bison \ 
+	dosfstools \ 
+	bc \ 
+	boxes \ 
+	python \ 
+    qemu \
+	qemu-user-static \ 
+    binfmt-support \
+	openssl \ 
+	expect \ 
+	libssl-dev \ 
+	libelf-dev \ 
+	device-tree-compiler \ 
+	libpixman-1-dev \ 
+	rsync \
+	ncurses-dev \
+	kmod \
+	liblz4-tool \
+    gdb \
+    btrfs-progs
+COPY qemu-aarch64 /var/lib/binfmts
+COPY qemu-arm /var/lib/binfmts

docker/qemu-aarch64

@@ -0,0 +1,10 @@
+qemu-user-static
+magic
+0
+\x7f\x45\x4c\x46\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xb7\x00
+\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff
+/usr/bin/qemu-aarch64-static
+
+yes
+
+yes

docker/qemu-arm

@@ -0,0 +1,10 @@
+qemu-user-static
+magic
+0
+\x7f\x45\x4c\x46\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x28\x00
+\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff
+/usr/bin/qemu-arm-static
+
+yes
+
+yes