RFR 8139106: ant build/test fails with jigsaw/jake/nashorn

[Sundararajan Athijegannathan]

Hi,

Please review http://cr.openjdk.java.net/~sundar/8139106/ for 
https://bugs.openjdk.java.net/browse/JDK-8139106

Changes:

* JSONCompatibleTest was in jdk.nashorn.api.scripting test - a package 
used in named module jdk.scripting.nashorn.
Moved this to a different package - like other tests this class is in 
jdk.nashorn.api.scripting.test package.

* module exports needed for nasgen and tests [nasgen and test classes 
are in unnamed modules] should use "ALL-UNNAMED" rather than blank.

* build.xml:
    1) compiling only jdk.scripting.nashorn module (leaving 'shell' 
module of nashorn)
    2) removed unnecessary -XaddExports
    3) Using -Xpatch... javac option rather than -J-Xpatch...  in 
"compile-test"

With these changes, I can do "ant clean test" and "ant clean 
test262parallel" with jake/nashorn. Couple of test262 issues fail - but 
that may be due to missing "whitespace handling fix" that went to 
jdk9-dev/nashorn recently. And there are few (internal) javadoc warnings 
for nashorn code.

Thanks,
-Sundar