RFR (S): 8147943 jvmti.h generated with GPL header

[serguei.spitsyn at oracle.com]

Please, review the fix for:
   https://bugs.openjdk.java.net/browse/JDK-8147943


Webrev:
http://cr.openjdk.java.net/~sspitsyn/webrevs/2016/hotspot/8147943-jvmti-header.hs1/


Summary:
   The problem is that the 
build/*/hotspot/variant-server/gensrc/jvmvtifiles/jvmti.h
   is currently generated with the GPL copyright comment.
   The JDK version of the header that we ship must havethe GPL + 
"Classpath" exception.
   So that the file is taken from the version that is checked into the 
jdk repository:
jdk/src/java.base/share/native/include/jvmti.h.

   Now, the checked-in version of the jvmti.h in the jdk repository is 
manually updated
   from the jvmvtifiles/jvmti.h with the copyright comment replacement 
(very inconvenient).

   Replacement of the copyright comment in the jvmvtifiles/jvmti.h was 
discussed
   Alan and Iris, and they are Ok with the change.

   The jvmti.h is generated from the 
hotspot/src/share/vm/prims/jvmti.xml with the XSL scripts,
   and its copyright comment is inherited from the jvmti.xml.
   The fix is to update the XSL scripts to generate the GPL+CP copyright 
comment.
   The only part that is still taken from the jvmti.xml is the copyright 
year line.

   There is a separate bug that targets automatic installation of the 
generated jvmti.h
   and potential removal of the checked-in version from the jdk repository:
     https://bugs.openjdk.java.net/browse/JDK-8063154
       Checked in jvmti.h not in sync with generated jvmti.h

Testing:
   Checked the copyright comment in the generated 
gensrc/jvmvtifiles.jvmti.h.


Thanks,
Serguei