Opt compiler: Add disassembly to the '.cfg' output.

This is automatically added to the '.cfg' output when using the usual
`--dump-cfg` option.

Change-Id: I864bfc3a8299c042e72e451cc7730ad8271e4deb
diff --git a/disassembler/disassembler.cc b/disassembler/disassembler.cc
index 6334717..e604c1f 100644
--- a/disassembler/disassembler.cc
+++ b/disassembler/disassembler.cc
@@ -55,4 +55,8 @@
   }
 }
 
+Disassembler* create_disassembler(InstructionSet instruction_set, DisassemblerOptions* options) {
+  return Disassembler::Create(instruction_set, options);
+}
+
 }  // namespace art