allow failure

.travis.yml

@@ -77,6 +77,9 @@ matrix:
     - env: TARGET=armv7-unknown-linux-gnueabihf
       os: linux
     # FIXME QEMU blows up
+    - env: TARGET=mips-unknown-linux-gnu
+      os: linux
+    # FIXME QEMU blows up
     - env: TARGET=powerpc64le-unknown-linux-gnu
       os: linux