Use a 'continue' here to stop from double lexing.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174833 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AsmParser/LLParser.cpp b/lib/AsmParser/LLParser.cpp
index 76eb596..9a76007 100644
--- a/lib/AsmParser/LLParser.cpp
+++ b/lib/AsmParser/LLParser.cpp
@@ -869,7 +869,7 @@
         return true;
 
       B.addAttribute(Attr, Val);
-      break;
+      continue;
     }
 
     // Target-independent attributes: