update CMake environment to include Visual Studio 2019

cmake/CMakeBuild/bin/pyhhi/build/app/cmk.py

cmake/CMakeBuild/bin/pyhhi/build/cmksupp.py

cmake/CMakeBuild/bin/pyhhi/build/common/bldtools.py

cmake/CMakeBuild/bin/pyhhi/build/common/cmbldver.py

cmake/CMakeBuild/bin/pyhhi/build/common/system.py

cmake/CMakeBuild/cmake/modules/BBuildEnv.cmake

cmake/CMakeBuild/cmake/modules/BBuildEnvDebug.cmake

cmake/CMakeBuild/cmake/modules/BBuildEnvVersion.cmake

...d/cmake/toolchains/aarch64-linux-gnu-gcc-ubuntu1804.cmake