[readobj] Fix memory leak.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174687 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/llvm-readobj/llvm-readobj.cpp b/tools/llvm-readobj/llvm-readobj.cpp
index 2edb660..0a43775 100644
--- a/tools/llvm-readobj/llvm-readobj.cpp
+++ b/tools/llvm-readobj/llvm-readobj.cpp
@@ -240,7 +240,8 @@
     return 1;
   }
 
-  ObjectFile *obj = ObjectFile::createObjectFile(File.take());
+  OwningPtr<ObjectFile> o(ObjectFile::createObjectFile(File.take()));
+  ObjectFile *obj = o.get();
   if (!obj) {
     errs() << InputFilename << ": Object type not recognized\n";
   }