Don't zero terminate the bitmap twice.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@149377 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGObjCMac.cpp b/lib/CodeGen/CGObjCMac.cpp
index 5bf4b0b..3b86c5a 100644
--- a/lib/CodeGen/CGObjCMac.cpp
+++ b/lib/CodeGen/CGObjCMac.cpp
@@ -4040,7 +4040,7 @@
   
   llvm::GlobalVariable * Entry =
   CreateMetadataVar("\01L_OBJC_CLASS_NAME_",
-                    llvm::ConstantDataArray::getString(VMContext, BitMap),
+                    llvm::ConstantDataArray::getString(VMContext, BitMap,false),
                     ((ObjCABI == 2) ?
                      "__TEXT,__objc_classname,cstring_literals" :
                      "__TEXT,__cstring,cstring_literals"),