Added a new attribute, objc_root_class, which informs the compiler when a root class is intentionally declared.
The warning this inhibits, -Wobjc-root-class, is opt-in for now. However, all clang unit tests that would trigger
the warning have been updated to use -Wno-objc-root-class. <rdar://problem/7446698>

llvm-svn: 154187
diff --git a/clang/test/SemaObjC/self-declared-in-block.m b/clang/test/SemaObjC/self-declared-in-block.m
index 25ce8ba..40a0331 100644
--- a/clang/test/SemaObjC/self-declared-in-block.m
+++ b/clang/test/SemaObjC/self-declared-in-block.m
@@ -1,5 +1,5 @@
-// RUN: %clang_cc1 -fsyntax-only -triple x86_64-apple-darwin10  -fblocks -verify %s 
-// RUN: %clang_cc1 -x objective-c++ -fsyntax-only -triple x86_64-apple-darwin10  -fblocks -verify %s 
+// RUN: %clang_cc1 -fsyntax-only -triple x86_64-apple-darwin10  -fblocks -verify -Wno-objc-root-class %s 
+// RUN: %clang_cc1 -x objective-c++ -fsyntax-only -triple x86_64-apple-darwin10  -fblocks -verify -Wno-objc-root-class %s 
 // rdar://9154582
 
 @interface Blocky @end