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/dex/quick/codegen_util.cc b/compiler/dex/quick/codegen_util.cc
index 6f81238..d58015a 100644
--- a/compiler/dex/quick/codegen_util.cc
+++ b/compiler/dex/quick/codegen_util.cc
@@ -1026,7 +1026,7 @@
     vmap_encoder.PushBackUnsigned(0u);  // Size is 0.
   }
 
-  UniquePtr<std::vector<uint8_t> > cfi_info(ReturnCallFrameInformation());
+  std::unique_ptr<std::vector<uint8_t>> cfi_info(ReturnCallFrameInformation());
   CompiledMethod* result =
       new CompiledMethod(cu_->compiler_driver, cu_->instruction_set, code_buffer_, frame_size_,
                          core_spill_mask_, fp_spill_mask_, encoded_mapping_table_,