specify EE in manifest.mf files and classpath (with work-around for access rule bug)
diff --git a/bundles/org.eclipse.wst.xml.core/META-INF/MANIFEST.MF b/bundles/org.eclipse.wst.xml.core/META-INF/MANIFEST.MF
index e32fada..ce823c3 100644
--- a/bundles/org.eclipse.wst.xml.core/META-INF/MANIFEST.MF
+++ b/bundles/org.eclipse.wst.xml.core/META-INF/MANIFEST.MF
@@ -71,3 +71,4 @@
  org.eclipse.wst.common.core;bundle-version="[1.1.0,1.2.0)",
  com.ibm.icu;bundle-version="[3.4.4,4.0.0)"
 Eclipse-LazyStart: true; exceptions="org.eclipse.wst.xml.core.internal.contenttype"
+Bundle-RequiredExecutionEnvironment: J2SE-1.4