[Clang] Migrate llvm::make_unique to std::make_unique

Now that we've moved to C++14, we no longer need the llvm::make_unique
implementation from STLExtras.h. This patch is a mechanical replacement
of (hopefully) all the llvm::make_unique instances across the monorepo.

Differential revision: https://reviews.llvm.org/D66259

llvm-svn: 368942
diff --git a/clang/lib/Driver/ToolChains/Gnu.cpp b/clang/lib/Driver/ToolChains/Gnu.cpp
index 30518a5..d4149ea 100644
--- a/clang/lib/Driver/ToolChains/Gnu.cpp
+++ b/clang/lib/Driver/ToolChains/Gnu.cpp
@@ -189,7 +189,7 @@
     GCCName = "gcc";
 
   const char *Exec = Args.MakeArgString(getToolChain().GetProgramPath(GCCName));
-  C.addCommand(llvm::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
+  C.addCommand(std::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
 }
 
 void tools::gcc::Preprocessor::RenderExtraToolArgs(
@@ -627,7 +627,7 @@
                      *this);
 
   const char *Exec = Args.MakeArgString(ToolChain.GetLinkerPath());
-  C.addCommand(llvm::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
+  C.addCommand(std::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
 }
 
 void tools::gnutools::Assembler::ConstructJob(Compilation &C,
@@ -878,7 +878,7 @@
     CmdArgs.push_back(II.getFilename());
 
   const char *Exec = Args.MakeArgString(getToolChain().GetProgramPath("as"));
-  C.addCommand(llvm::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
+  C.addCommand(std::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
 
   // Handle the debug info splitting at object creation time if we're
   // creating an object.