added support for 64 bit linux in FindOpenCASCADE.cmake
added support for 64 bit linux in FindOpenCASCADE.cmake

codingpoets/tigl,DLR-SC/tigl,DLR-SC/tigl,codingpoets/tigl,codingpoets/tigl,DLR-SC/tigl,codingpoets/tigl,codingpoets/tigl,DLR-SC/tigl,DLR-SC/tigl,codingpoets/tigl,DLR-SC/tigl