Added the missing export in MANIFEST.MF.

This fixes bug 440352.

Change-Id: I4b1c63087a97b7b2f3d7bdb5e066424a84ef6cef
Signed-off-by: Yuxuan 'fishy' Wang <fishywang@google.com>

org.eclipse.jgit/META-INF/MANIFEST.MF

@@ -48,6 +48,7 @@ Export-Package: org.eclipse.jgit.api;version="3.5.0";
  org.eclipse.jgit.gitrepo;version="3.5.0";
   uses:="org.eclipse.jgit.api,
    org.eclipse.jgit.lib",
+ org.eclipse.jgit.gitrepo.internal;version="3.5.0",
  org.eclipse.jgit.ignore;version="3.5.0",
  org.eclipse.jgit.internal;version="3.5.0";x-friends:="org.eclipse.jgit.test,org.eclipse.jgit.http.test",
  org.eclipse.jgit.internal.storage.dfs;version="3.5.0";x-friends:="org.eclipse.jgit.test",