Unweaken vtables as per http://llvm.org/docs/CodingStandards.html#ll_virtual_anch

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@146959 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Lex/Lexer.cpp b/lib/Lex/Lexer.cpp
index a9b11d6..25e320d 100644
--- a/lib/Lex/Lexer.cpp
+++ b/lib/Lex/Lexer.cpp
@@ -59,6 +59,8 @@
 // Lexer Class Implementation
 //===----------------------------------------------------------------------===//
 
+void Lexer::anchor() { }
+
 void Lexer::InitLexer(const char *BufStart, const char *BufPtr,
                       const char *BufEnd) {
   InitCharacterInfo();