Use private linkage for globals we already name with \01L and \01l.

In llvm the only semantic difference between internal and private is that llvm
tries to hide private globals my mangling them with a private prefix. Since
the globals changed by this patch already had the magic don't mangle marker,
there should be no change in the generated assembly.

A followup patch should then be able to drop the \01L and \01l prefixes and let
llvm mangle as appropriate.

llvm-svn: 202419
diff --git a/clang/test/CodeGenObjC/arc.m b/clang/test/CodeGenObjC/arc.m
index 06628b9..8fc68ca 100644
--- a/clang/test/CodeGenObjC/arc.m
+++ b/clang/test/CodeGenObjC/arc.m
@@ -581,11 +581,11 @@
 // rdar://problem/12492434
 //   Note that we set the flag saying that we need destruction *and*
 //   the flag saying that we don't also need construction.
-// CHECK-GLOBALS: @"\01l_OBJC_CLASS_RO_$_Test23" = internal global [[RO_T:%.*]] { i32 390,
+// CHECK-GLOBALS: @"\01l_OBJC_CLASS_RO_$_Test23" = private global [[RO_T:%.*]] { i32 390,
 @interface Test23 { id x; } @end
 @implementation Test23 @end
 
-// CHECK-GLOBALS: @"\01l_OBJC_CLASS_RO_$_Test24" = internal global [[RO_T:%.*]] { i32 130,
+// CHECK-GLOBALS: @"\01l_OBJC_CLASS_RO_$_Test24" = private global [[RO_T:%.*]] { i32 130,
 @interface Test24 {} @end
 @implementation Test24 @end