remove unneeded llvm:: namespace qualifiers on some core types now that LLVM.h imports
them into the clang namespace.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@135852 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Frontend/LangStandards.cpp b/lib/Frontend/LangStandards.cpp
index af1721d..abb521b 100644
--- a/lib/Frontend/LangStandards.cpp
+++ b/lib/Frontend/LangStandards.cpp
@@ -29,7 +29,7 @@
   }
 }
 
-const LangStandard *LangStandard::getLangStandardForName(llvm::StringRef Name) {
+const LangStandard *LangStandard::getLangStandardForName(StringRef Name) {
   Kind K = llvm::StringSwitch<Kind>(Name)
 #define LANGSTANDARD(id, name, desc, features) \
     .Case(name, lang_##id)