Add docker file to build android image

Dockerfile

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+FROM ubuntu:latest
+
+RUN mkdir /build
+WORKDIR /build
+
+# Setup PATH to allow running android tools.
+ENV PATH=$PATH:/build/android-ndk/bin
+ENV PATH=$PATH:/build/android-sdk-linux/tools
+ENV PATH=$PATH:/build/android-sdk-linux/platform-tools
+
+# So it looks like the default sdk gives us a 32-bit executable, but then it
+# whines about it. Not sure how to download a 64-bit executable in the sdk so
+# just let the 32-bit thing run for now.
+ENV ANDROID_EMULATOR_FORCE_32BIT=true
+
+# Install necessary packages:
+RUN dpkg --add-architecture i386
+RUN apt-get -y update
+RUN apt-get -y install expect curl libncurses5:i386 libstdc++6:i386 zlib1g:i386 \
+                       openjdk-6-jre gcc-multilib
+
+# Prep the Android NDK
+#
+# See https://github.com/servo/servo/wiki/Building-for-Android
+RUN curl -O http://dl.google.com/android/ndk/android-ndk-r9c-linux-x86_64.tar.bz2
+RUN tar xf android-ndk-r9c-linux-x86_64.tar.bz2
+RUN bash android-ndk-r9c/build/tools/make-standalone-toolchain.sh \
+        --platform=android-18 \
+        --toolchain=arm-linux-androideabi-4.8 \
+        --install-dir=/build/android-ndk \
+        --ndk-dir=/build/android-ndk-r9c \
+        --arch=arm
+RUN rm -rf android-ndk-r9c-linux-x86_64.tar.bz2
+RUN rm -rf android-ndk-r9c
+
+# Prep the SDK and emulator
+#
+# Note that the update process requires that we accept a bunch of licenses, and
+# we can't just pipe `yes` into it for some reason, so we take the same strategy
+# located in https://github.com/appunite/docker by just wrapping it in a script
+# which apparently magically accepts the licenses.
+RUN curl -O http://dl.google.com/android/android-sdk_r24.3.4-linux.tgz
+RUN tar xf android-sdk_r24.3.4-linux.tgz
+COPY ci/android-accept-licenses.sh /build/android-accept-licenses.sh
+RUN ["./android-accept-licenses.sh", \
+     "android - update sdk -a --no-ui --filter platform-tools,android-18,sys-img-armeabi-v7a-android-18"]
+RUN echo "no" | android create avd \
+                --name test \
+                --target android-18 \
+                --abi armeabi-v7a
+RUN rm -rf android-sdk_r24.3.4-linux.tgz
+RUN rm android-accept-licenses.sh
+
+# Install rustc + extra targets
+RUN curl https://static.rust-lang.org/rustup.sh | \
+      sh -s -- --spec=nightly-2015-09-08 -y
+RUN curl https://people.mozilla.org/~acrichton/libc-test/2015-09-08/arm-linux-androideabi.tar.gz | \
+      tar xzf - -C /usr/local/lib/rustlib
+RUN mkdir /root/.cargo
+COPY ci/cargo-config /root/.cargo/config
+ENV CARGO_TARGET_DIR=/root/target
+
+RUN mkdir /clone
+WORKDIR /clone

ci/android-accept-licenses.sh

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+#!/usr/bin/expect -f
+
+set timeout 1800
+set cmd [lindex $argv 0]
+set licenses [lindex $argv 1]
+
+spawn {*}$cmd
+expect {
+  "Do you accept the license '*'*" {
+        exp_send "y\r"
+        exp_continue
+  }
+  eof
+}

ci/cargo-config

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+[target.arm-linux-androideabi]
+linker = "arm-linux-androideabi-gcc"

ci/run.sh

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+#!/bin/sh
+
+set -ex
+
+TARGET=$1
+cargo test --manifest-path libc-test/Cargo.toml --no-run --target $TARGET
+
+if [ "$TARGET" = "arm-linux-androideabi" ]; then
+    emulator @test -no-window &
+    adb wait-for-device
+    adb push /root/target/$TARGET/debug/all-* /data/test
+    adb shell /data/test
+else
+    cargo test --manifest-path libc-test/Cargo.toml --target $TARGET
+fi