gcc/testsuite:

	* objc-obj-c++-shared/next-mapping.h: Add copyright header.
	Split type definitions and NSConstantString class into...
	* objc-obj-c++-shared/objc-test-suite-types.h: New.
	* objc-obj-c++-shared/nsconstantstring-class.h: New.
	* objc-obj-c++-shared/nsconstantstring-class-impl.h: New.
	* objc-obj-c++-shared/nsconstantstring-class-impl.m: New.
	* objc-obj-c++-shared/nsconstantstring-class-impl.mm: New.
	* objc-obj-c++-shared/next-abi.h: Add copyright header, minor update
	to comments.
	* objc-obj-c++-shared/objc-test-suite-next-encode-assist.h: Adjust
	encode defines for newer NeXT system headers.
	* obj-c++.dg/template-4.mm: Adjust to use nsconstantstring headers.
	* obj-c++.dg/torture/strings/string1.mm: Likewise.
	* objc.dg/foreach-5.m: Likewise.
	* objc.dg/foreach-2.m: Likewise.
	* objc.dg/foreach-4.m: Likewise.
	* objc.dg/torture/strings/string1.m: Likewise.
	* objc.dg/torture/strings/string2.m: Likewise.
	* objc.dg/torture/strings/string3.m: Likewise.
	* objc.dg/torture/strings/string4.m: Likewise.
	* obj-c++.dg/torture/strings/const-str-3.mm: Adjust to use type
	header and stand alone.
	* obj-c++.dg/strings/strings-2.mm: Likewise.
	* objc.dg/torture/strings/const-str-3.m: Likewise.
	* objc.dg/strings/strings-2.m: Likewise.
	* objc.dg/strings/const-str-12b.m: Likewise.

From-SVN: r168653