Attempt to fix linux missing libraries in ubuntu 16.04

Author: yossizap

.travis.yml

@@ -135,6 +135,7 @@ script:
   - export PKG_CONFIG_PATH="$CUSTOM_BREAKPAD_PREFIX/lib/pkgconfig:$CUSTOM_PYTHON_PREFIX/lib/pkgconfig:$PKG_CONFIG_PATH"
   - export QT_QPA_PLATFORM_PATH=$Qt5_ROOT/plugins
   - export QT_QPA_PLATFORM=minimal
+  - export LD_LIBRARY_PATH=./Radare2-prefix/lib:$LD_LIBRARY_PATH
   - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then
         if [[ "$BUILD_SYSTEM" == "qmake" ]]; then
             qmake