[patch, mips, stabs] Fix stabs failures in GCC testsuite

[Maciej W. Rozycki]

On Fri, 3 May 2013, Maciej W. Rozycki wrote:

> because I think all this is really papering over the problem of forgetting 
> the label state across a section switch.  This happens implicitly for 
> these .stab directives (that are also seldom used these days), but I 
> reckon I saw a case where it mattered for explicit section switches and 
> had to be worked around somehow.  It would be good to have some thought as 
> to how to do this properly some day.

 However after some further thinking I believe a good less-effort solution 
for GCC might be to produce a .insn directive after any label considered a 
code entry point, where GAS supports the pseudo-op.  This would avoid 
surprises in case something else turned out to clear the instruction mode 
again.  What do you think?

  Maciej