function epilogues for ppc64

[Paul Gilliam]

I am investigating a bug with watchpoints on ppc64: the message 
'Watchpoint <n> deleted because the program has left the block in which its expression is valid.'
is given one stack-level before it is true.

I beleave that the cause is that the routine 'in_function_epilogue_p()' always returns 0 for the ppc64 because the
default, 'generic_in_function_epilogue_p ()' always returns 0.

So why is there no ppc64_in_function_eplilogue_p()?

Should the dwarf '.debug_frame' section information be used some how?

-=# Paul #=-