RFC: Adding visualization of jumps to objdump's disassembly output

[Nick Clifton]

Hi Guys,

  Attached is the latest version of Thomas Troeger's patch to add
  visualization of jumps to objdump's output.  When enabled, the output
  changes to look something like this snippet:
  
  c6:	|  |     \----------> be 00 00 00 00       	mov    $0x0,%esi
  cb:	|  |           /----> 48 8b 3d 00 00 00 00 	mov    0x0(%rip),%rdi        # d2 <main+0xd2>
  d2:	|  |           |      31 c0                	xor    %eax,%eax
  d4:	|  |           |  /-- e8 00 00 00 00       	callq  d9 <main+0xd9>
  d9:	|  |           |  \-> bf 02 00 00 00       	mov    $0x2,%edi
  de:	|  +-----------|----- e8 00 00 00 00       	callq  e3 <main+0xe3>
  e3:	|  \-----------|----> 48 89 da             	mov    %rbx,%rdx
  e6:	|              |      be 00 00 00 00       	mov    $0x0,%esi
  eb:	|              \----- eb de                	jmp    cb <main+0xcb>
  ed:	\-------------------> 48 8b 16             	mov    (%rsi),%rdx

  (Not shown in this email is the fact that you can also add
  color/colour to the output...)
   
  I am posting the patch here as I would very much like to see it added
  before the 2.34 branch is cut, but I wanted more pairs of eyes than
  just mine to have a look over it.  So - does anyone have any concerns
  or issues with the patch ?

Cheers
  Nick

PS.  Still working on the ChangeLog entries...

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