[jdktools] update

[Geir Magnusson Jr.]

1) I have a simple but working version of a 'launcher launcher' now in 
jdktools, called 'samsa'.

It's designed to live in jdk/bin under different names (javac, javap, 
java...) and simply do the Right Thing to invoke the jre/bin java with 
the right classpath and tool class specified.

Right now, we have 'javac' for linux :) and I'll test more tomorrow, and 
port to Windows tomorrow.

2) I'll test (launcher) and finish (jpda) the native builds under 
windows tomorrow.

This should give us enough for our first JDK snapshot, which I hope to 
do this weekend.

geir