message: Add more logging to ClangModulesDeclVendor.cpp
diff: @@ -624,12 +624,21 @@ ClangModulesDeclVendor::Create(Target &target) {
  clang::CompilerInstance::createDiagnostics(new clang::DiagnosticOptions,
  new StoringDiagnosticConsumer);
  + Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
  + if (log)
  + log->PutString("ClangModulesDeclVendor::Create()");
  std::vector<const char *> compiler_invocation_argument_cstrs;
  compiler_invocation_argument_cstrs.reserve(
  compiler_invocation_arguments.size());
  for (const std::string &arg : compiler_invocation_arguments) {
  compiler_invocation_argument_cstrs.push_back(arg.c_str());
  + if (log) {
  + log->PutString("\n ");
  + log->PutString(arg);
  }
  + }
  + if (log)
  + log->PutString("\n");
  std::shared_ptr<clang::CompilerInvocation> invocation =
  clang::createInvocationFromCommandLine(compiler_invocation_argument_cstrs,
  