Merge pull request rust-lang#3402 from scampi/stdsimd

set the TARGET envar for the stdsimd integration test

Author: topecongiro

.travis.yml

@@ -31,7 +31,7 @@ matrix:
     - env: INTEGRATION=rand
     - env: INTEGRATION=rust-clippy
     - env: INTEGRATION=rust-semverver
-    - env: INTEGRATION=stdsimd
+    - env: INTEGRATION=stdsimd TARGET=x86_64-unknown-linux-gnu
     - env: INTEGRATION=tempdir
   allow_failures:
     # Doesn't build - seems to be because of an option