cmake HAVE_VCS_VERSION_INC examples

vgvassilev/clad lib/Differentiator/CMakeLists.txt :27 

set_property(SOURCE Version.cpp APPEND PROPERTY
  COMPILE_DEFINITIONS "HAVE_VCS_VERSION_INC")

o2e/OLLVM-9.0.1 tools/clang/lib/Basic/CMakeLists.txt :36 

set_property(SOURCE Version.cpp APPEND PROPERTY
             COMPILE_DEFINITIONS "HAVE_VCS_VERSION_INC")