Now we have a proper C++ library, use std::unique_ptr.

Also remove the Android.libcxx.mk and other bits of stlport compatibility
mechanics.

Change-Id: Icdf7188ba3c79cdf5617672c1cfd0a68ae596a61
diff --git a/compiler/elf_writer_mclinker.h b/compiler/elf_writer_mclinker.h
index 3c1a47b..955e5d2 100644
--- a/compiler/elf_writer_mclinker.h
+++ b/compiler/elf_writer_mclinker.h
@@ -17,9 +17,9 @@
 #ifndef ART_COMPILER_ELF_WRITER_MCLINKER_H_
 #define ART_COMPILER_ELF_WRITER_MCLINKER_H_
 
-#include "elf_writer.h"
+#include <memory>
 
-#include "UniquePtrCompat.h"
+#include "elf_writer.h"
 #include "safe_map.h"
 
 namespace mcld {
@@ -73,11 +73,11 @@
                                    const CompiledCode& compiled_code);
 
   // Setup by Init()
-  UniquePtr<mcld::LinkerConfig> linker_config_;
-  UniquePtr<mcld::LinkerScript> linker_script_;
-  UniquePtr<mcld::Module> module_;
-  UniquePtr<mcld::IRBuilder> ir_builder_;
-  UniquePtr<mcld::Linker> linker_;
+  std::unique_ptr<mcld::LinkerConfig> linker_config_;
+  std::unique_ptr<mcld::LinkerScript> linker_script_;
+  std::unique_ptr<mcld::Module> module_;
+  std::unique_ptr<mcld::IRBuilder> ir_builder_;
+  std::unique_ptr<mcld::Linker> linker_;
 
   // Setup by AddOatInput()
   // TODO: ownership of oat_input_?