Remove 'using std::error_code' from tools.

llvm-svn: 210876
diff --git a/llvm/tools/lli/RemoteMemoryManager.cpp b/llvm/tools/lli/RemoteMemoryManager.cpp
index 041f7c7..4816517 100644
--- a/llvm/tools/lli/RemoteMemoryManager.cpp
+++ b/llvm/tools/lli/RemoteMemoryManager.cpp
@@ -19,7 +19,6 @@
 #include "llvm/Support/Format.h"
 
 using namespace llvm;
-using std::error_code;
 
 #define DEBUG_TYPE "lli"
 
@@ -62,7 +61,7 @@
 }
 
 sys::MemoryBlock RemoteMemoryManager::allocateSection(uintptr_t Size) {
-  error_code ec;
+  std::error_code ec;
   sys::MemoryBlock MB = sys::Memory::allocateMappedMemory(Size,
                                                           &Near,
                                                           sys::Memory::MF_READ |