message: project: override the compdb entry with .ccls if compile_commands.json is not used
  Note: `exact_match` should be false if the entry is an synthetic one, instead
  of an explicit entry in compile_commands.json
diff: @@ -522,9 +522,10 @@ Project::Entry Project::findEntry(const std::string &path, bool can_redirect,
  auto it = folder.path2entry_index.find(path);
  if (it != folder.path2entry_index.end()) {
  Project::Entry &entry = folder.entries[it->second];
  - exact_match = entry.filename == path;
  - if ((match = exact_match || can_redirect) || entry.compdb_size) {
  - // best->compdb_size is >0 for a compdb entry, 0 for a .ccls entry.
  + // best->compdb_size is >0 for an explicit compile_commands.json
  + // entry, 0 for an implicit entry.
  + exact_match = entry.compdb_size > 0 && entry.filename == path;
  + if ((match = exact_match || can_redirect) && entry.compdb_size) {
  best_compdb_folder = &folder;
  best = &entry;
  }
  