message: Update lldb to match clang r301442.
  This code really doesn't make any sense: there is only ever one InputKind here.
  Plus, this is an incomplete and out-of-date copy-paste of some Clang code. This
  really ought to be revisited, but this change should get the bots green again.
diff: @@ -378,10 +378,9 @@ static void ParseLangArgs(LangOptions &Opts, InputKind IK, const char *triple) {
  // Set some properties which depend solely on the input kind; it would be nice
  // to move these to the language standard, and have the driver resolve the
  // input kind + language standard.
  - if (IK == IK_Asm) {
  + if (IK.getLanguage() == InputKind::Asm) {
  Opts.AsmPreprocessor = 1;
  - } else if (IK == IK_ObjC || IK == IK_ObjCXX || IK == IK_PreprocessedObjC ||
  - IK == IK_PreprocessedObjCXX) {
  + } else if (IK.isObjectiveC()) {
  Opts.ObjC1 = Opts.ObjC2 = 1;
  }
  @@ -389,30 +388,24 @@ static void ParseLangArgs(LangOptions &Opts, InputKind IK, const char *triple) {
  if (LangStd == LangStandard::lang_unspecified) {
  // Based on the base language, pick one.
  - switch (IK) {
  - case IK_None:
  - case IK_AST:
  - case IK_LLVM_IR:
  - case IK_RenderScript:
  + switch (IK.getLanguage()) {
  + case InputKind::Unknown:
  + case InputKind::LLVM_IR:
  + case InputKind::RenderScript:
  llvm_unreachable("Invalid input kind!");
  - case IK_OpenCL:
  + case InputKind::OpenCL:
  LangStd = LangStandard::lang_opencl;
  break;
  - case IK_CUDA:
  - case IK_PreprocessedCuda:
  + case InputKind::CUDA:
  LangStd = LangStandard::lang_cuda;
  break;
  - case IK_Asm:
  - case IK_C:
  - case IK_PreprocessedC:
  - case IK_ObjC:
  - case IK_PreprocessedObjC:
  + case InputKind::Asm:
  + case InputKind::C:
  + case InputKind::ObjC:
  LangStd = LangStandard::lang_gnu99;
  break;
  - case IK_CXX:
  - case IK_PreprocessedCXX:
  - case IK_ObjCXX:
  - case IK_PreprocessedObjCXX:
  + case InputKind::CXX:
  + case InputKind::ObjCXX:
  LangStd = LangStandard::lang_gnucxx98;
  break;
  }
  @@ -784,8 +777,8 @@ IdentifierTable *ClangASTContext::getIdentifierTable() {
  LangOptions *ClangASTContext::getLanguageOptions() {
  if (m_language_options_ap.get() == nullptr) {
  m_language_options_ap.reset(new LangOptions());
  - ParseLangArgs(*m_language_options_ap, IK_ObjCXX, GetTargetTriple());
  - // InitializeLangOptions(*m_language_options_ap, IK_ObjCXX);
  + ParseLangArgs(*m_language_options_ap, InputKind::ObjCXX, GetTargetTriple());
  + // InitializeLangOptions(*m_language_options_ap, InputKind::ObjCXX);
  }
  return m_language_options_ap.get();
  }
  