Update .travis.yml

.travis.yml

@@ -17,6 +17,7 @@ script:
   - cmake -G "Unix Makefiles" -DASSIMP_ENABLE_BOOST_WORKAROUND=YES -DASSIMP_NO_EXPORT=$TRAVIS_NO_EXPORT -STATIC_BUILD=$TRAVIS_STATIC_BUILD
   - make
   - sudo make install
+  - sudo ldconfig
   - cd test/unit
   - ../../bin/unit
   - cd ../regression