[build] fixed a build issue (on 'ant dist') on windows.

apparently on windows symlinking requires admin rights because ?????
This can be fixed with an explicit update to group policies, which I
can't assume anybody working on lombok is going to actually do.
/bin/ln in msysgit just copies (interesting choice). I could write a mechanism
that tries /bin/ln and if not there, try <copy> instead, either in the build scripts
or in ivyplusplus, but that's way too much effort to avoid a 2MB copy. So,
for now, we just copy... if more symlinking is to be done later, we'll revisit, though.
copying is such a silly waste of time, slowing down the build for no reason.

buildScripts/setup.ant.xml

@@ -36,7 +36,7 @@ This buildfile is part of projectlombok.org. It sets up the build itself.
 	<property name="ssh.configuration.file" location="ssh.configuration" />
 	
 	<target name="-setup.ssh.ask">
-		<propertyfile file="${ssh.configuration.file}" />
+		<property file="${ssh.configuration.file}" />
 		<fail>
 			Your ssh.configuration file is corrupted; delete it and rerun this script.
 			<condition>