RFR: JDK-6604021: RMIC is defaulting to BOOT jdk version, needs to be rmic.jar

[Erik Joelsson]

Currently the RMI stubs in the jdk are built with the newly built rmic 
binary at the end of the build. This patch changes that and instead 
builds a bootstrap version of the rmic classes, much like bootstrap 
javac in langtools, which runs on the bootjdk, but generates classes for 
the new jdk. The new solution is more friendly to cross compilation.

A few notes on the patch:

* In src/share/classes/sun/tools/tree/Node.java, I had to change a call 
to a jdk8 only constructor in java.lang.InternalError.
* The packages included when compiling rmic were just picked by 
extending for each missing class until the compilation succeeded. If 
someone knows of a crucial package or class that needs to be included, 
please say so.
* I renamed a parameter to SetupJavaCompilation. I do not consider the 
parameter a hack anymore, but a necessary option for this case.
* In RMICompilation, the dependency file is now a real touch file 
instead of a virtual one. This was needed for proper dependencies in 
GenerateClasses.gmk.
* All of corba is compiled twice since I have no idea which parts would 
actually be needed. This doesn't add much build time since it can be run 
effectively in parallel with the rest of the corba build.
* I put the compilation of bootstrap rmic in GenerateClasses.gmk 
directly instead of Tools.gmk. This was to not add much compile time, 
since Tools.gmk is included and therefore parsed a lot.

Bug: https://bugs.openjdk.java.net/browse/JDK-6604021
Webrev: http://cr.openjdk.java.net/~erikj/6604021/webrev.01/

/Erik