c++: namespace-scoped friend in local class [PR69410]
do_friend was only considering class-qualified identifiers for the
qualified-id case, but we also need to skip local scope when there's an
explicit namespace scope.
PR c++/69410
gcc/cp/ChangeLog:
* friend.c (do_friend): Handle namespace as scope argument.
* decl.c (grokdeclarator): Pass down in_namespace.