PR c++/88136 - -Wdeprecated-copy false positives

PR c++/88136 - -Wdeprecated-copy false positives

Deprecating the copy operations because the class has a user-provided
destructor turns out to have too many false positives; this patch adjusts
-Wdeprecated-copy to only deprecate if the other copy operation is
user-provided.  To get the earlier behavior, people can explicitly request
it with -Wdeprecated-copy-dtor.

gcc/c-family/
	* c.opt (Wdeprecated-copy-dtor): New.
	(Wdeprecated-copy): Move to -Wextra.
gcc/cp/
	* class.c (classtype_has_depr_implicit_copy): Rename from
	classtype_has_user_copy_or_dtor.
	* method.c (lazily_declare_fn): Adjust.
	* decl2.c (cp_warn_deprecated_use): Refer to -Wdeprecated-copy-dtor
	if deprecation is due to a destructor.

From-SVN: r266867