Switch attribute macros to use 'LLVM_' as a prefix. We retain the old names

until other LLVM projects using these are cleaned up.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117200 91177308-0d34-0410-b5e6-96231b3b80d8

unittests/ADT/SmallVectorTest.cpp

@@ -77,7 +77,7 @@ public:
     return c0.getValue() == c1.getValue();
   }
 
-  friend bool ATTRIBUTE_UNUSED
+  friend bool LLVM_ATTRIBUTE_UNUSED
   operator!=(const Constructable & c0, const Constructable & c1) {
     return c0.getValue() != c1.getValue();
   }