8201540: [AIX] Extend the set of supported charsets in java.base
Reviewed-by: alanb, sherman, simonis
Contributed-by: bhamaram@in.ibm.com
#
# generate these charsets into sun.nio.cs
#
Big5
Big5_Solaris
Big5_HKSCS
EUC_CN
EUC_KR
GBK
GB18030
IBM856
IBM921
IBM922
IBM942
IBM942C
IBM943
IBM943C
IBM950
IBM970
IBM1046
IBM1124
IBM1383
ISO_8859_6
ISO_8859_8
MS1252
TIS_620