Auto merge of #821 - malbarbo:mips64el-test, r=alexcrichton

Add mips64el to CI
diff --git a/.travis.yml b/.travis.yml
index c60f092..80246d1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -75,6 +75,7 @@
     - env: TARGET=mips-unknown-linux-musl
     - env: TARGET=mipsel-unknown-linux-musl
     - env: TARGET=mips64-unknown-linux-gnuabi64
+    - env: TARGET=mips64el-unknown-linux-gnuabi64
     - env: TARGET=mips-unknown-linux-gnu
     - env: TARGET=s390x-unknown-linux-gnu
     - env: TARGET=asmjs-unknown-emscripten
diff --git a/ci/docker/mips64el-unknown-linux-gnuabi64/Dockerfile b/ci/docker/mips64el-unknown-linux-gnuabi64/Dockerfile
new file mode 100644
index 0000000..434c908
--- /dev/null
+++ b/ci/docker/mips64el-unknown-linux-gnuabi64/Dockerfile
@@ -0,0 +1,11 @@
+FROM ubuntu:17.10
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+        gcc libc6-dev qemu-user ca-certificates \
+        gcc-mips64el-linux-gnuabi64 libc6-dev-mips64el-cross \
+        qemu-system-mips64el
+
+ENV CARGO_TARGET_MIPS64EL_UNKNOWN_LINUX_GNUABI64_LINKER=mips64el-linux-gnuabi64-gcc \
+    CARGO_TARGET_MIPS64EL_UNKNOWN_LINUX_GNUABI64_RUNNER="qemu-mips64el -L /usr/mips64el-linux-gnuabi64" \
+    CC_mips64el_unknown_linux_gnuabi64=mips64el-linux-gnuabi64-gcc \
+    PATH=$PATH:/rust/bin