GDB MI Reverse Commands added [3 of 3]

[Jakob Engblom]

> Changelog:
> 
> testsuite/gdb.mi/
> * mi2-reverse.exp: New file. Test for reverse option to the following MI
> commands: exec-continue, exec-finish, exec-next, exec-step,
> exec-next-instruction, exec-step-instruction. (liangyi@newfield-tech.com)

And finally, to simplify the paperwork, we change the contributor here so taht
our subcontractor does not have to deal with copyright assignments. 

* mi2-reverse.exp: 2009-08-31, Tomas Holmberg <th@virtutech.com> New file. Test
for reverse option to the following MI commands: exec-continue, exec-finish,
exec-next, exec-step, exec-next-instruction, exec-step-instruction, working on
process record. 

/jakob