Don't use 'using std::error_code' in include/llvm.

This should make sure that most new uses use the std prefix.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210835 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/ExecutionEngine/SectionMemoryManager.h

@@ -21,7 +21,6 @@
 #include "llvm/Support/Memory.h"
 
 namespace llvm {
-
 /// This is a simple memory manager which implements the methods called by
 /// the RuntimeDyld class to allocate memory for section-based loading of
 /// objects, usually those generated by the MCJIT execution engine.
@@ -93,8 +92,8 @@ private:
   uint8_t *allocateSection(MemoryGroup &MemGroup, uintptr_t Size,
                            unsigned Alignment);
 
-  error_code applyMemoryGroupPermissions(MemoryGroup &MemGroup,
-                                         unsigned Permissions);
+  std::error_code applyMemoryGroupPermissions(MemoryGroup &MemGroup,
+                                              unsigned Permissions);
 
   MemoryGroup CodeMem;
   MemoryGroup RWDataMem;