Travis: macos fix

.travis.yml

@@ -32,6 +32,10 @@ script:
     if [[ "${TRAVIS_OS_NAME}" == "linux" ]]; then
       sudo unlink /usr/bin/gcc && sudo ln -s /usr/bin/gcc-5 /usr/bin/gcc
     fi
+  - |
+    if [[ "${TRAVIS_OS_NAME}" == "osx" ]]; then
+      export LIBRARY_PATH=$LIBRARY_PATH:/usr/local/opt/openssl/lib/
+    fi    
   - |
     if [[ "${TRAVIS_OS_NAME}" == "windows" ]]; then
       echo "Running make_tests.bat..."