Allow #pragma unused to be used on global variables like gcc. Fixes rdar://8793832.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@124383 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaAttr.cpp b/lib/Sema/SemaAttr.cpp
index a67c4fb..c983199 100644
--- a/lib/Sema/SemaAttr.cpp
+++ b/lib/Sema/SemaAttr.cpp
@@ -277,8 +277,8 @@
   }
 
   VarDecl *VD = Lookup.getAsSingle<VarDecl>();
-  if (!VD || !(VD->hasLocalStorage() || VD->isStaticLocal())) {
-    Diag(PragmaLoc, diag::warn_pragma_unused_expected_localvar)
+  if (!VD) {
+    Diag(PragmaLoc, diag::warn_pragma_unused_expected_var_arg)
       << Name << SourceRange(IdTok.getLocation());
     return;
   }