Hopefully fix linux travis ci

Author: MoritzMaxeiner

.travis.yml

@@ -18,6 +18,7 @@ before_install:
   - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then sudo apt-get -qq update; fi
   - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then sudo apt-get install llvm-3.6; fi
   - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then sudo ln -s /usr/lib/llvm-3.6/lib/libLLVM-3.6.so /usr/lib/libLLVM.so; fi
+  - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then sudo ln -s /usr/lib/llvm-3.6/lib/libLTO.so /usr/lib/libLTO.so; fi
 
   - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew update; fi
   - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew install [email protected]; fi