message: Fix windows build after r293821
  We started passing the list of libraries to link to the
  add_lldb_unittest macro, but that macro wasn't actually doing anything
  with them. Fix that.
diff: @@ -40,7 +40,7 @@ function(add_lldb_unittest test_name)
  COMMAND "${CMAKE_COMMAND}" -E make_directory ${CMAKE_CURRENT_BINARY_DIR}/Inputs)
  lldb_link_common_libs(${test_name} EXE)
  - target_link_libraries(${test_name} ${CLANG_USED_LIBS} ${LLDB_SYSTEM_LIBS})
  + target_link_libraries(${test_name} ${ARG_LINK_LIBS} ${CLANG_USED_LIBS} ${LLDB_SYSTEM_LIBS})
  endfunction()
  function(add_unittest_inputs test_name inputs)
  