gcc/testsuite:
	Based on the CFString implementation in FSF apple/trunk branch.
	
	* lib/objc-dg.exp (objc-dg-runtest): Merge flags and additional flags
	so that the latter can be used in dg-skip and dg-xfail clauses.
	* lib/obj-c++-dg.exp (obj-c++-dg-runtest): Likewise.
	* obj-c++.dg/template-4.mm: Don't use CFStrings on Darwin. Update test
	to use dg-additional-files for Object1.
	* obj-c++.dg/const-str-7.mm: Don't use CFStrings on Darwin. Update test
	to use dg-additional-files for Object1, move to torture/strings/.
	* obj-c++.dg/const-str-4.mm: Likewise.
	* obj-c++.dg/const-str-3.mm: Likewise.
	* obj-c++.dg/const-str-8.mm: Likewise.
	* obj-c++.dg/const-str-9.mm: Likewise.
	* obj-c++.dg/const-str-10.mm: Likewise.
	* obj-c++.dg/const-str-10.mm: Likewise.
	* obj-c++.dg/const-str-1.mm: Don't use CFStrings on Darwin. Update test
	to use dg-additional-files for Object1, move to strings/.
	* obj-c++.dg/const-str-2.mm: Likewise.
	* obj-c++.dg/const-str-5.mm: Likewise.
	* obj-c++.dg/const-str-6.mm: Likewise.
	* obj-c++.dg/const-str-12.mm: Likewise.
	* obj-c++.dg/strings/strings.exp: New.
	* obj-c++.dg/strings/const-cfstring-2.mm: New.
	* obj-c++.dg/strings/const-cfstring-5.mm: New.
	* obj-c++.dg/torture/strings/strings.exp: New.
	* obj-c++.dg/torture/strings/string1.mm: New.
	* obj-c++.dg/torture/strings/const-cfstring-1.mm: New.
	* obj-c++.dg/torture/strings/const-cfstring-3.mm: New.
	* obj-c++.dg/torture/strings/const-cfstring-4.mm: New.
	
	* objc/execute/string1.m: Don't use CFStrings on Darwin. Update test
	to use dg-additional-files for Object1, move to objc.dg/torture/strings/.
	* objc/execute/string2.m: Likewise.
	* objc/execute/string3.m: Likewise.
	* objc/execute/string3.m: Likewise.
	* objc.dg/foreach-2.m: Don't use CFStrings on Darwin.
	* objc.dg/foreach-4.m: Likewise.
	* objc.dg/foreach-5.m: Likewise.
	* objc.dg/const-str-3.m: Don't use CFStrings on Darwin. Update test
	to use dg-additional-files for Object1, move to objc.dg/torture/strings/.
	* objc.dg/const-str-4.m: Likewise.
	* objc.dg/const-str-7.m: Likewise.
	* objc.dg/const-str-8.m: Likewise.
	* objc.dg/const-str-9.m: Likewise.
	* objc.dg/const-str-10.m: Likewise.
	* objc.dg/const-str-11.m: Likewise.
	* objc.dg/const-str-1.m: Don't use CFStrings on Darwin. Update test
	to use dg-additional-files for Object1, move to objc.dg/strings/.
	* objc.dg/const-str-2.m: Likewise.
	* objc.dg/const-str-5.m: Likewise.
	* objc.dg/const-str-6.m: Likewise.
	* objc.dg/const-str-12.m: Likewise.
	* objc.dg/const-str-12b.m: Likewise.
	* objc.dg/strings/strings.exp: New.
	* objc.dg/strings/const-cfstring-2.m: New.
	* objc.dg/strings/const-cfstring-5.m: New.
	* objc.dg/torture/strings/strings.exp: New.
	* objc.dg/torture/strings/const-cfstring-1.m: New.
	* objc.dg/torture/strings/const-cfstring-3.m: New.
	* objc.dg/torture/strings/const-cfstring-4.m: New.

From-SVN: r165821