message: Fix project loading absolute path normalization for clang_args
diff: @@ -125,7 +125,7 @@ Project::Entry GetCompilationEntryFromCompileCommandEntry(
  auto cleanup_maybe_relative_path = [&](const std::string& path) {
  assert(!path.empty());
  - if (path[0] == '/')
  + if (path[0] == '/' || entry.directory.empty())
  return NormalizePathWithTestOptOut(path);
  return NormalizePathWithTestOptOut(entry.directory + "/" + path);
  };
  