message: Target: attempt to repair the VS2017 build
  The use of the Swift metadata.h which uses variadic templates causes a
  failure in permissive mode.  Disable the permissive mode to try to get
  this to build again.
diff: @@ -85,9 +85,10 @@ add_lldb_library(lldbTarget
  LINK_COMPONENTS
  Support
  )
  -
  if(CMAKE_CXX_COMPILER_ID STREQUAL Clang)
  target_compile_options(lldbTarget PRIVATE -Wno-dollar-in-identifier-extension)
  +elseif(MSVC)
  + target_compile_options(lldbTarget PRIVATE /permissive-)
  endif()
  add_dependencies(lldbTarget
  