Fix missing export warning in MANIFEST.MF
Fix missing export warning in MANIFEST.MF

"This plug-in does not export all of its packages"

Change-Id: Ie71014d960ea62caf48d2b41110af7348050543d

paulvi/egit,paulvi/egit,SmithAndr/egit,SmithAndr/egit,wdliu/egit,blizzy78/egit,wdliu/egit,collaborative-modeling/egit,collaborative-modeling/egit