hg: jdk/sandbox: 8213618: IBM970 charset has missing entry and remove unexpected entries

[chris.hegarty at oracle.com]

Changeset: bc1fadfd2396
Author:    itakiguchi
Date:      2018-12-02 11:09 -0800
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/bc1fadfd2396

8213618: IBM970 charset has missing entry and remove unexpected entries
Reviewed-by: srl, martin

! make/data/charsetmapping/IBM970.c2b
! make/data/charsetmapping/IBM970.map
! test/jdk/sun/nio/cs/TestIBMBugs.java