[rfa] i386-tdep.c: add some insn's to prologue analyzer

[Michael Elizabeth Chastain]

mark> Can you check whether it really solves the problems you were seeing.

It sure does.  Woot!

mark> I'll move this over to the branch in a few days if things turn out
mark> to be allright.

I am doing a full test run tonight.  I'll be sure to whine if
anything regresses.

I'm really happy about this because it's one of the few things left
on gdb 6 issues list.

Michael C

===

Index: ChangeLog
from  Mark Kettenis  <kettenis@gnu.org>

	Based on a patch from Michael Elizabeth Chastain (mec@shout.net):
	* i386-tdep.c (i386_analyze_frame_setup): Recognize more
	instructions that GCC likes to mingle into the prologue.  Fixes
	gdb/1253 and gdb/1255.