build failure in nashorn with sjavac enabled

[Maurizio Cimadamore]

Hi,
I was doing experiments with the recently added sjavac flag to enable 
smart recompilation of JDK classes. I got a failure in Nashorn (I'm 
building on linux x64, Ubuntu 11.10):

## Starting nashorn
Compiling BUILD_NASHORN
Compiling 106 files in 7 packages (jdk.internal.dynalink to 
jdk.nashorn.internal.codegen.types)
Compiling 117 files in 7 packages (jdk.nashorn.internal.ir to 
jdk.nashorn.internal.parser)
Compiling 192 files in 14 packages (jdk.nashorn.internal.runtime to 
netscape.javascript)
Compiling BUILD_NASGEN
Compiling 19 files in 1 packages
Compiling 33 files in 3 packages (commons to signature)
Compiling 53 files in 3 packages (tree to util)
invalid flag: 
/home/maurizio/Documents/ws/jdk8/tl/build/linux-x86_64-normal-server-release/nashorn/nasgen_classes
invalid flag: 
/home/maurizio/Documents/ws/jdk8/tl/build/linux-x86_64-normal-server-release/nashorn/nasgen_classes
invalid flag: 
/home/maurizio/Documents/ws/jdk8/tl/build/linux-x86_64-normal-server-release/nashorn/nasgen_classes
make[1]: *** 
[/home/maurizio/Documents/ws/jdk8/tl/build/linux-x86_64-normal-server-release/nashorn/nasgen_classes/javac_state] 
Error 255
make: *** [nashorn-only] Error 2

Probably just matter of converting the Nashorn build files to be sjavac 
aware...

Maurizio