whoops

I'm sure there's a better way to test the travis build than committing to master,
but why bother when this time will obviously work!

.travis.yml

@@ -16,7 +16,7 @@ install:
   - git config --global user.email "you@example.com"
   - git config --global user.name "Your Name"
   - mkdir ~/pyston-build && cd ~/pyston-build
-  - make ~/pyston llvm_up
+  - make -C ~/pyston llvm_up
   - cmake -GNinja $TRAVIS_BUILD_DIR
   - ninja libunwind ext_cpython