Release note for 'nodebug' on variables

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@275817 91177308-0d34-0410-b5e6-96231b3b80d8

docs/ReleaseNotes.rst

@@ -72,6 +72,16 @@ New Pragmas in Clang
 
 Clang now supports the ...
 
+
+Attribute Changes in Clang
+--------------------------
+
+- The ``nodebug`` attribute may now be applied to static, global, and local
+  variables (but not parameters or non-static data members). This will suppress
+  all debugging information for the variable (and its type, if there are no
+  other uses of the type).
+
+
 Windows Support
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