8187910: Charset MS950_HKSCS not supported in JDK 9
Reviewed-by: alanb
## generate these charsets into sun.nio.cs#GBKJohabMS1255MS1256MS1258MS874MS932JIS_X_0201 # JIS_X_0201 is used by MS932 in its contains() methodSJIS # SJIS must go together with MS932 to support sun.nio.cs.mapMS936MS949MS950MS950_HKSCSMS950_HKSCS_XP