8039751: UTF-8 decoder fails to handle some edge cases correctly
Summary: to update decoder.isMalformed4_2() to correctly detect out of range 2nd byte
Reviewed-by: alanb

7197491: update copyright year to match last edit in jdk8 jdk repository
Reviewed-by: chegar, ksrini

7096080: UTF8 update and new CESU-8 charset
7082884: Incorrect UTF8 conversion for sequence ED 31
7082883: Incorrect UTF8 conversion for sequence fc 80 80 8f bf bf
Summary: Updated UTF8 and added CESU-8 to following the latest Standard
Reviewed-by: alanb

7040220: java/char_encodin Optimize UTF-8 charset for String.getBytes()/new String(byte[])
Summary: implement sun.nio.cs.ArrayEn/Decoer in utf8
Reviewed-by: alanb

6943119: Rebrand source copyright notices
Reviewed-by: darcy, weijun

4486841: UTF-8 decoder should adhere to corrigendum to Unicode 3.0.1
6636317: Optimize UTF-8 coder for ASCII input
Summary: re-write the UTF-8 charset to obey the standard and improve the performance
Reviewed-by: alanb