1. Support the private use subtag in #langdef according to RFC 4646. 2. Fix that the wrong file is reported when error happens.
1. Support the private use subtag in #langdef according to RFC 4646.
2. Fix that the wrong file is reported when error happens.

git-svn-id: f3880c1fc5096ce2109c8aec392d8e07f619f417@1948 c2973edb-eda0-4c78-bc6a-9341b269661f

bitcrystal/buildtools-BaseTools,bitcrystal/buildtools-BaseTools,bitcrystal/buildtools-BaseTools,bitcrystal/buildtools-BaseTools,tianocore/buildtools-BaseTools,tianocore/buildtools-BaseTools,tianocore/buildtools-BaseTools,tianocore/buildtools-BaseTools,bitcrystal/buildtools-BaseTools,tianocore/buildtools-BaseTools