hg: jdk/jdk: 8187910: Charset MS950_HKSCS not supported in JDK 9

[xueming.shen at oracle.com]

Changeset: d0cf025a5e79
Author:    sherman
Date:      2017-11-30 11:19 -0800
URL:       http://hg.openjdk.java.net/jdk/jdk/rev/d0cf025a5e79

8187910: Charset MS950_HKSCS not supported in JDK 9
Reviewed-by: alanb

! make/data/charsetmapping/charsets
! make/data/charsetmapping/stdcs-windows
! make/jdk/src/classes/build/tools/charsetmapping/Main.java
! src/jdk.charsets/share/classes/sun/nio/cs/ext/Big5_HKSCS.java.template
- src/jdk.charsets/share/classes/sun/nio/cs/ext/MS950_HKSCS.java
+ src/jdk.charsets/share/classes/sun/nio/cs/ext/MS950_HKSCS.java.template