fixbug: fix exception about failed to resolve TupleElementNamesAttribute:.ctor sometime

[windyuuy]

fix #937 fixbug: fix exception about failed to resolve TupleElementNamesAttribute:.ctor sometime

The key "parameter.token" is updated, but the dictionary "CustomAttributes" not, thus get CustomAttribute by parameter.token as key will return wrong value. When it LookupToken will throw exception for unmatched module of wrong CustomAttribute.