Replace OwningPtr with std::unique_ptr.

This compiles cleanly with lldb/lld/clang-tools-extra/llvm.

llvm-svn: 203279
diff --git a/clang/lib/StaticAnalyzer/Checkers/FixedAddressChecker.cpp b/clang/lib/StaticAnalyzer/Checkers/FixedAddressChecker.cpp
index c73b068..60bb036 100644
--- a/clang/lib/StaticAnalyzer/Checkers/FixedAddressChecker.cpp
+++ b/clang/lib/StaticAnalyzer/Checkers/FixedAddressChecker.cpp
@@ -25,7 +25,7 @@
 namespace {
 class FixedAddressChecker 
   : public Checker< check::PreStmt<BinaryOperator> > {
-  mutable OwningPtr<BuiltinBug> BT;
+  mutable std::unique_ptr<BuiltinBug> BT;
 
 public:
   void checkPreStmt(const BinaryOperator *B, CheckerContext &C) const;