[XeTeX] bug in xecyr

[Imposeren]

This is wrong:
  \DeclareUTFcharacter[\UTFencname]{x0407}{\CYRII} % Ї
  \DeclareUTFcharacter[\UTFencname]{x0457}{\cyrii} % ї
  \DeclareUTFcharacter[\UTFencname]{x0406}{\CYRYI} % І
  \DeclareUTFcharacter[\UTFencname]{x0456}{\cyryi} % і

Correct:
  \DeclareUTFcharacter[\UTFencname]{x0407}{\CYRYI} % Ї
  \DeclareUTFcharacter[\UTFencname]{x0457}{\cyryi} % ї
  \DeclareUTFcharacter[\UTFencname]{x0406}{\CYRII} % І
  \DeclareUTFcharacter[\UTFencname]{x0456}{\cyrii} % і