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/llvm/gbc_expander.cc b/compiler/llvm/gbc_expander.cc
index cf28db3..25c9b20 100644
--- a/compiler/llvm/gbc_expander.cc
+++ b/compiler/llvm/gbc_expander.cc
@@ -141,7 +141,7 @@
 
   std::vector<llvm::BasicBlock*> basic_block_landing_pads_;
   llvm::BasicBlock* current_bb_;
-  std::map<llvm::BasicBlock*, std::vector<std::pair<llvm::BasicBlock*, llvm::BasicBlock*> > >
+  std::map<llvm::BasicBlock*, std::vector<std::pair<llvm::BasicBlock*, llvm::BasicBlock*>>>
       landing_pad_phi_mapping_;
   llvm::BasicBlock* basic_block_unwind_;
 
@@ -545,7 +545,7 @@
     }
 
     llvm::TerminatorInst* term_inst = lbb->getTerminator();
-    std::vector<std::pair<llvm::BasicBlock*, llvm::BasicBlock*> >& rewrite_pair
+    std::vector<std::pair<llvm::BasicBlock*, llvm::BasicBlock*>>& rewrite_pair
         = landing_pad_phi_mapping_[lbb];
     irb_.SetInsertPoint(lbb->begin());