Fix VTK for ubuntu 18.04

platforms/ubuntu/18.04/cmake_configure.sh

@@ -10,6 +10,6 @@ cd ..
 cd platforms/ubuntu/18.04
 mkdir -p build
 cd build
-cmake -DBUILD_TESTS:BOOL=FALSE -DBUILD_PERF_TESTS:BOOL=FALSE -DBUILD_opencv_apps:BOOL=FALSE -DBUILD_opencv_python2:BOOL=FALSE -DBUILD_DOCS:BOOL=FALSE -DWITH_TBB:BOOL=TRUE -DWITH_CUDA:BOOL=FALSE -DWITH_IPP:BOOL=FALSE -DWITH_EIGEN:BOOL=FALSE  -DOPENCV_EXTRA_MODULES_PATH=../../../../opencv_contrib/modules -DBUILD_opencv_ts:BOOL=FALSE -DBUILD_SHARED_LIBS:BOOL=FALSE -DVTK_DIR:String="$PWD/vtk" -DCMAKE_BUILD_TYPE:String="Release" -DCMAKE_CXX_STANDARD:String="11" ../../../..
+cmake -DBUILD_TESTS:BOOL=FALSE -DBUILD_PERF_TESTS:BOOL=FALSE -DBUILD_opencv_apps:BOOL=FALSE -DBUILD_opencv_python2:BOOL=FALSE -DBUILD_DOCS:BOOL=FALSE -DWITH_TBB:BOOL=TRUE -DWITH_CUDA:BOOL=FALSE -DWITH_IPP:BOOL=FALSE -DWITH_EIGEN:BOOL=FALSE  -DOPENCV_EXTRA_MODULES_PATH=../../../../opencv_contrib/modules -DBUILD_opencv_ts:BOOL=FALSE -DBUILD_SHARED_LIBS:BOOL=FALSE -DVTK_DIR:String="$PWD/../../../../vtk" -DCMAKE_BUILD_TYPE:String="Release" -DCMAKE_CXX_STANDARD:String="11" ../../../..
 make
 cd ..