[RFA] Patch to fix "reverse-step" command error

[teawater]

Hi Michael,

This patch is for bug in
http://sourceware.org/ml/gdb-patches/2009-02/msg00246.html.

The reason of bug is when inferior reverse exection into dynsym
resolve code, gdb doesn't insert breakpoint in right address.
It just happen in some distributions for example SLED.

This patch make gdb insert breakpoint in right address or step in that case.

2008-03-02  Hui Zhu  <teawater@gmail.com>

	* infrun.c (handle_inferior_event): Make inferior insert
	breakpoint at right address or step in reverse and it stepped
	into dynsym resolve code.

Thanks,
Hui