Add support for instruction level tracing to the ARM simulator.
* wrapper.c (op_print): New function.
(sim_dis_read): New function.
(print_insn): New function - disassembles the given instruction.
(sim_trace): Note that tracing is now allowed.
(sim_create_inferior): Default to emulating v6.
Initialise the disassembler machinery.
(sim_target_parse_command_line): Add support for -t -d and -z
options.
(sim_target_display_usage): Note existence of -d and -z options.
(sim_open): Parse -t -d and -z options.
* armemu.h: Add exports of trace, disas and trace_funcs.
Add prototype for print_insn.
* armemu.c (ARMul_Emulate26): Add tracing code.
Delete unused variables.
* thumbemu (handle_v6_thumb_insn): Delete unused variable Rd.
Move Rm variable into switch cases.
Add tracing code.