The following should make the "run-testchooser" target in jme2's build.xml work again, which is now missing the native libraries and hence not working.
Should work on win32 (tested) and linux (assumed), I don't have the slightest idea how well osx carbon and cocoa will deal with the libraries for both being on java.library.path together 
Maybe somebody could test that and report if it works.
If it doesn't, it is probably safe to remove the swt libraries altogether for testchooser, but I thought maybe some time in the future somebody might want to use swt or jogl in ant targets, so I added them for reference.
# This patch file was generated by NetBeans IDE
# It uses platform neutral UTF-8 encoding and n newlines.
# Above lines and this line are ignored by the patching process.
Index: build.xml
--- build.xml Base (BASE)
+++ build.xml Locally Modified (Based On LOCAL)
@@ -56,7 +56,7 @@
<target name="run-testchooser" depends="compile-test" description="Runs the TestChooser">
<java classname="jmetest.TestChooser" fork="true" classpathref="classpath">
- <jvmarg value="-Djava.library.path=${libs}" />
+ <jvmarg value= "-Djava.library.path=${libs}/jogl/native/windows_i586;${libs}/lwjgl/native/linux;${libs}/lwjgl/native/macosx;${libs}/lwjgl/native/win32;${libs}/swt/linux;${libs}/swt/macosx-carbon;${libs}/swt/macosx-cocoa;${libs}/swt/windows"/>
</java>
</target>