Add mips64el to CI
diff --git a/.travis.yml b/.travis.yml
index e3c30b0..421f2b3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -73,6 +73,7 @@
     - 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