Fix ant task Wscompile cannot be found in NB 6

The bug seems to be in /nbproject/project.properties:
Change:
wscompile.classpath=${wscompile.tools.classpath}:${j2ee.platform.wscompile.classpath}
To:
wscompile.classpath=${wscompile.tools.classpath}:${j2ee.platform.wscompile.classpath}:${javac.classpath}