Create Dockerfile ubuntu-aarch64

Create Dockerfile ubuntu-aarch64
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docker/ubuntu-aarch64/Dockerfile

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+FROM ubuntu:14.04
+WORKDIR /build
+# install tools and dependencies
+RUN apt-get -y update && \
+        apt-get install -y --force-yes --no-install-recommends \
+        curl git make g++ gcc-aarch64-linux-gnu g++-aarch64-linux-gnu \
+        libc6-arm64-cross libc6-dev-arm64-cross wget file ca-certificates \
+        binutils-aarch64-linux-gnu \
+        && \
+    apt-get clean
+
+# install rustup
+RUN curl https://sh.rustup.rs -sSf | sh -s -- -y
+
+# rustup directory
+ENV PATH /root/.cargo/bin:$PATH
+
+ENV RUST_TARGETS="aarch64-unknown-linux-gnu"
+
+# multirust add arm--linux-gnuabhf toolchain
+RUN rustup target add aarch64-unknown-linux-gnu
+
+# show backtraces
+ENV RUST_BACKTRACE 1
+
+# set compilers
+ENV CXX aarch64-linux-gnu-g++
+ENV CC aarch64-linux-gnu-gcc
+
+# show tools
+ RUN rustc -vV && \
+ cargo -V && \
+ gcc -v &&\
+ g++ -v
+
+# build parity
+RUN git clone https://github.com/ethcore/parity && \
+        cd parity && \
+        mkdir -p .cargo && \
+        echo '[target.aarch64-unknown-linux-gnu]\n\
+        linker = "aarch64-linux-gnu-gcc"\n'\
+        >>.cargo/config && \
+        cat .cargo/config && \
+        cargo build --target aarch64-unknown-linux-gnu --release --verbose && \
+        ls /build/parity/target/aarch64-unknown-linux-gnu/release/parity &&     \
+        /usr/bin/aarch64-linux-gnu-strip /build/parity/target/aarch64-unknown-linux-gnu/release/parity
+RUN file /build/parity/target/aarch64-unknown-linux-gnu/release/parity