Use enum to set debug info size generated by Clang

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@155697 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/BackendUtil.cpp b/lib/CodeGen/BackendUtil.cpp
index 2f44711..9633dec 100644
--- a/lib/CodeGen/BackendUtil.cpp
+++ b/lib/CodeGen/BackendUtil.cpp
@@ -219,7 +219,7 @@
                                     CodeGenOpts.EmitGcovArcs,
                                     TargetTriple.isMacOSX()));
 
-    if (!CodeGenOpts.DebugInfo)
+    if (CodeGenOpts.DebugInfo == CodeGenOptions::NoDebugInfo)
       MPM->add(createStripSymbolsPass(true));
   }