message: Add comment with short issue description.
diff: @@ -75,6 +75,10 @@ struct ProjectConfig {
  // TODO: See
  // https://github.com/Valloric/ycmd/blob/master/ycmd/completers/cpp/flags.py.
  +// Flags '-include' and '-include-pch' are blacklisted here cause libclang returns error in case when
  +// precompiled header was generated by a different compiler (even two different builds of same version
  +// of clang for the same platform are incompatible). Note that libclang always generate it's own pch
  +// internally. For details, see https://github.com/Valloric/ycmd/issues/892 .
  std::vector<std::string> kBlacklistMulti = {
  "-MF", "-MT", "-MQ", "-o", "--serialize-diagnostics", "-Xclang", "-include", "-include-pch"};
  