Hello,

The attached patch removes from signals.exp any tests covered by 
sigstep.exp (I'm assuming that my sigstep.exp patch is approved).

This leaves one test (forcing a signal delivery), and for that, I merged 
it with a weaker but equivalent test found at the end of the .exp file.

The only interesting bit [well I think] is that I'm also removing 
several xfails.  The xfailed test (it should have been a kfail) is 
checking that GDB remembers that it was single-stepping, so that when a 
signal handler breakpoint is hit and then continued, GDB resumes the 
earlier single-step task.  Making this work would involve a stack of 
outstanding commands and would require a very good UI design. 
Consequently, I think the feature & test can be dropped until someone is 
motivated to design / implement it.

I have ensured that sigstep.exp tests a related case - step/next working 
correctly when skipping a handler.

ok?

Andrew

PS: `fixed' PPC NetBSD