8080330: (cs) Charset.availableCharsets failing with NPE on several platforms

[Alan Bateman]

This method is currently broken in jdk9/dev and is causing several test 
failures. It looks like the changes JDK-8035302 missed a file.

I need a Reviewer for the patch below. Additionally the 
test/sun/nio/cs/TestCompoundTest.java can be removed. I'm sure Sherman 
will have suggestions for other clean-up but for now I think it would be 
good to get jdk9/dev stable again.

Thanks,
Alan.


diff --git a/make/data/charsetmapping/charsets 
b/make/data/charsetmapping/charsets
--- a/make/data/charsetmapping/charsets
+++ b/make/data/charsetmapping/charsets
@@ -1833,10 +1833,3 @@
  ##
  ########################################################

-charset x-COMPOUND_TEXT COMPOUND_TEXT
-    package sun.nio.cs.ext
-    type    source
-    os      unix
-    alias   COMPOUND_TEXT       # JDK historical
-    alias   x11-compound_text
-    alias   x-compound-text