7117053: Fix build warnings in com/sun/tools/jdi/*
Summary: Warnings fixed. Also reviewed by serguei.spitsyn@oracle.com, who is not yet an openjdk reviewer
Reviewed-by: ksrini
# clzName csName hisName containASCII pkg
IBM437 IBM437 Cp437 false sun.nio.cs
IBM737 x-IBM737 Cp737 false sun.nio.cs
IBM775 IBM775 Cp775 false sun.nio.cs
IBM850 IBM850 Cp850 false sun.nio.cs
IBM852 IBM852 Cp852 false sun.nio.cs
IBM855 IBM855 Cp855 false sun.nio.cs
IBM857 IBM857 Cp857 false sun.nio.cs
IBM858 IBM00858 Cp858 false sun.nio.cs
IBM862 IBM862 Cp862 false sun.nio.cs
IBM866 IBM866 Cp866 false sun.nio.cs
IBM874 x-IBM874 Cp874 false sun.nio.cs
ISO_8859_2 ISO-8859-2 ISO8859_2 true sun.nio.cs
ISO_8859_4 ISO-8859-4 ISO8859_4 true sun.nio.cs
ISO_8859_5 ISO-8859-5 ISO8859_5 true sun.nio.cs
ISO_8859_7 ISO-8859-7 ISO8859_7 true sun.nio.cs
ISO_8859_9 ISO-8859-9 ISO8859_9 true sun.nio.cs
ISO_8859_13 ISO-8859-13 ISO8859_13 true sun.nio.cs
ISO_8859_15 ISO-8859-15 ISO8859_15 true sun.nio.cs
KOI8_R KOI8-R KOI8_R true sun.nio.cs
KOI8_U KOI8-U KOI8_U true sun.nio.cs
MS1250 windows-1250 Cp1250 true sun.nio.cs
MS1251 windows-1251 Cp1251 true sun.nio.cs
MS1252 windows-1252 Cp1252 true sun.nio.cs
MS1253 windows-1253 Cp1253 true sun.nio.cs
MS1254 windows-1254 Cp1254 true sun.nio.cs
MS1257 windows-1257 Cp1257 true sun.nio.cs