gcc/testsuite/

	PR target/55654
	PR target/55656
	PR target/55657
	* obj-c++.dg/cxx-ivars-3.mm: Use NSObject instead of Object.
	* obj-c++.dg/strings/const-cfstring-5.mm: Likewise.
	* obj-c++.dg/torture/strings/const-str-10.mm: Likewise.
	* obj-c++.dg/torture/strings/const-str-9.mm: Likewise.
	* objc.dg/image-info.m: Likewise.
	* objc.dg/symtab-1.m: Likewise.
	* objc.dg/torture/strings/const-str-10.m: Likewise.
	* objc.dg/torture/strings/const-str-11.m: Likewise.
	* objc.dg/torture/strings/const-str-9.m: Likewise.
	* objc.dg/zero-link-1.m: Likewise.
	* objc.dg/zero-link-2.m: Likewise.
	* objc.dg/no-extra-load.m: Avoid Foundation.h.
	* objc.dg/objc-foreach-4.m: Likewise.
	* objc.dg/objc-foreach-5.m: Likewise.
	* obj-c++.dg/proto-lossage-7.mm: Use NSObject instead of Object
	(for Darwin).
	* obj-c++.dg/strings/const-str-12.mm: Likewise.
	* obj-c++.dg/syntax-error-1.mm: Likewise.
	* objc.dg/method-6.m: Likewise.
	* objc.dg/pr23214.m: Likewise.
	* objc.dg/proto-lossage-7.m: Likewise.
	* objc.dg/strings/const-str-12b.m: Likewise.
	* objc.dg/zero-link-3.m: Likewise.
	* obj-c++.dg/method-12.mm: Skip on Darwin versions without 'Object'.
	* objc.dg/encode-7-next-64bit.m: Use NSObject instead of Object,
	adjust headers, interfaces and encoded types to reflect current system
	versions.  Add FIXME and outputs from current system compiler for
	reference.

From-SVN: r200977