Trying to fix the Hexagon and debian-fast bots arm32_neon_vcnt_upgrade.ll test.

llvm-svn: 233558
diff --git a/llvm/lib/IR/AutoUpgrade.cpp b/llvm/lib/IR/AutoUpgrade.cpp
index 88efef0..1a74b61 100644
--- a/llvm/lib/IR/AutoUpgrade.cpp
+++ b/llvm/lib/IR/AutoUpgrade.cpp
@@ -745,7 +745,7 @@
     return;
   }
 
-  llvm::StringRef Name = CI->getName();
+  std::string Name = CI->getName();
   if (!Name.empty())
     CI->setName(Name + ".old");