Enable streaming of bitcode

This CL delays reading of function bodies from initial parse until
materialization, allowing overlap of compilation with bitcode download.

llvm-svn: 149918
diff --git a/llvm/lib/Target/X86/Disassembler/X86Disassembler.h b/llvm/lib/Target/X86/Disassembler/X86Disassembler.h
index 38c7084..588a81a 100644
--- a/llvm/lib/Target/X86/Disassembler/X86Disassembler.h
+++ b/llvm/lib/Target/X86/Disassembler/X86Disassembler.h
@@ -114,7 +114,7 @@
   /// getInstruction - See MCDisassembler.
   DecodeStatus getInstruction(MCInst &instr,
                               uint64_t &size,
-                              const MemoryObject &region,
+                              MemoryObject &region,
                               uint64_t address,
                               raw_ostream &vStream,
                               raw_ostream &cStream) const;