travis spaghetti

.travis.yml

 language: rust
 sudo: true
 
+compiler:
+  - clang
+
 before_install:
   - wget https://github.com/facebook/rocksdb/archive/rocksdb-3.8.tar.gz; tar xvf rocksdb-3.8.tar.gz && cd rocksdb-rocksdb-3.8 && make shared_lib; make install
 
@@ -14,3 +17,4 @@ os:
 
 script:
   - cargo build
+  - cargo test