Make helper function static.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@191615 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/AttributeList.cpp b/lib/Sema/AttributeList.cpp
index 8755a50..c980772 100644
--- a/lib/Sema/AttributeList.cpp
+++ b/lib/Sema/AttributeList.cpp
@@ -155,7 +155,7 @@
   #include "clang/Sema/AttrParsedAttrImpl.inc"
 }
 
-const ParsedAttrInfo& getInfo(const AttributeList& A) {
+static const ParsedAttrInfo &getInfo(const AttributeList &A) {
   return AttrInfoMap[A.getKind()];
 }