Move the static DeclAttrs map into ASTContext. Fixes <rdar://problem/6983177>.

llvm-svn: 73702
diff --git a/clang/lib/Analysis/CheckObjCUnusedIVars.cpp b/clang/lib/Analysis/CheckObjCUnusedIVars.cpp
index 7979f9c..92c50e2 100644
--- a/clang/lib/Analysis/CheckObjCUnusedIVars.cpp
+++ b/clang/lib/Analysis/CheckObjCUnusedIVars.cpp
@@ -74,7 +74,7 @@
       continue;
 
     // Skip IB Outlets.
-    if (ID->getAttr<IBOutletAttr>())
+    if (ID->getAttr<IBOutletAttr>(Ctx))
       continue;
     
     M[ID] = Unused;