re-enable the tests for non-nightly channels

Author: japaric

.travis.yml

@@ -35,16 +35,16 @@ matrix:
       rust: nightly
 
     # Linux
-    # - env: TARGET=i686-unknown-linux-gnu
-    # - env: TARGET=i686-unknown-linux-musl
-    # - env: TARGET=x86_64-unknown-linux-gnu
-    # - env: TARGET=x86_64-unknown-linux-musl
+    - env: TARGET=i686-unknown-linux-gnu
+    - env: TARGET=i686-unknown-linux-musl
+    - env: TARGET=x86_64-unknown-linux-gnu
+    - env: TARGET=x86_64-unknown-linux-musl
 
     # OSX
-    # - env: TARGET=i686-apple-darwin
-    #   os: osx
-    # - env: TARGET=x86_64-apple-darwin
-    #   os: osx
+    - env: TARGET=i686-apple-darwin
+      os: osx
+    - env: TARGET=x86_64-apple-darwin
+      os: osx
 
 install:
   - sh ci/install.sh