Cruby r35460 r37101

commit 4c126983ab8bca619c12338ef65b43b9c44fce6a

    Use ENC_DUMMY_UNICODE for UTF-16 and UTF-32

    Merge CRuby r37101.
    The name "ENC_DUMMY_UNICODE" indicates to CRuby that it is an encoding
    of Unicode family in pre-compile process of CRuby encoding build process.
    For more detail, inspect CRuby's build process of encdb.h and enc/encdb.c.

commit f77e9058b15c9326a681432240bff2f77dff7c7f

    Add EUC-JP-2004 as alias of EUC-JP

    Merge CRuby r35460.