Make MemoryObject accessor members const again

llvm-svn: 151687
diff --git a/llvm/lib/Target/X86/Disassembler/X86Disassembler.h b/llvm/lib/Target/X86/Disassembler/X86Disassembler.h
index 85e8ab6..c11f51c 100644
--- a/llvm/lib/Target/X86/Disassembler/X86Disassembler.h
+++ b/llvm/lib/Target/X86/Disassembler/X86Disassembler.h
@@ -117,7 +117,7 @@
   /// getInstruction - See MCDisassembler.
   DecodeStatus getInstruction(MCInst &instr,
                               uint64_t &size,
-                              MemoryObject &region,
+                              const MemoryObject &region,
                               uint64_t address,
                               raw_ostream &vStream,
                               raw_ostream &cStream) const;