added x-internal to a few packages
diff --git a/jpa/plugins/org.eclipse.jpt.core/META-INF/MANIFEST.MF b/jpa/plugins/org.eclipse.jpt.core/META-INF/MANIFEST.MF
index 026c577..05ebb71 100644
--- a/jpa/plugins/org.eclipse.jpt.core/META-INF/MANIFEST.MF
+++ b/jpa/plugins/org.eclipse.jpt.core/META-INF/MANIFEST.MF
@@ -64,11 +64,11 @@
  org.eclipse.jpt.core.internal.jpa2.resource.java;x-internal:=true,
  org.eclipse.jpt.core.internal.jpa2.resource.java.binary;x-internal:=true,
  org.eclipse.jpt.core.internal.jpa2.resource.java.source;x-internal:=true,
- org.eclipse.jpt.core.internal.libprov,
- org.eclipse.jpt.core.internal.libval,
+ org.eclipse.jpt.core.internal.libprov;x-internal:=true,
+ org.eclipse.jpt.core.internal.libval;x-internal:=true,
  org.eclipse.jpt.core.internal.operations;
   x-friends:="org.eclipse.jpt.jaxb.core",
- org.eclipse.jpt.core.internal.platform,
+ org.eclipse.jpt.core.internal.platform;x-internal:=true,
  org.eclipse.jpt.core.internal.prefs;x-internal:=true,
  org.eclipse.jpt.core.internal.refactoring;x-internal:=true,
  org.eclipse.jpt.core.internal.resource;x-internal:=true,