Introduce QEMU build scripts

kotlin-native/tools/qemu/Dockerfile

@@ -0,0 +1,20 @@
+FROM ubuntu:20.04
+
+ENV TZ=Europe/Moscow
+RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
+
+RUN apt-get update && apt-get upgrade -y
+RUN apt-get install -y build-essential git gcc pkg-config glib-2.0 libglib2.0-dev libsdl1.2-dev libaio-dev libcap-dev libattr1-dev libpixman-1-dev
+
+RUN git clone --branch v5.1.0 --depth 1 git://git.qemu.org/qemu.git && \
+    cd qemu && \
+    git checkout d0ed6a69d399ae193959225cdeaa9382746c91cc && \
+    git submodule update --init --recursive
+
+WORKDIR /qemu
+
+COPY build.sh .
+
+ENV OUTPUT_DIR="/output"
+
+ENTRYPOINT "/bin/bash" "build.sh" ${OUTPUT_DIR}