trying to fix travis macos build fail. don't know if this work or not. I don't...

trying to fix travis macos build fail. don't know if this work or not. I don't have mac to test it :)

.travis.yml

@@ -15,7 +15,7 @@ before_install:
     fi
   - if [ "$TRAVIS_OS_NAME" = "osx" ]; then
         brew update;
-        brew install gcc49 pkg-config Caskroom/cask/osxfuse;
+        brew install Caskroom/cask/osxfuse;
     fi
 notifications:
   email: false