Merge r6156:

AIX5 support.  No changes in logic; just better factorisation of what
is already here.

- add AIX definitions for VG_UCONTEXT_INSTR_PTR et al

- add abstractions VKI_SIGINFO_si_addr and VKI_SIGINFO_si_pid
  to enable the rest of the code to be uniform

- track other minor changes: SysRes, VG_(am_find_nsegment) 
  constness, rearrangement of VG_(sigtimedwait).



git-svn-id: svn://svn.valgrind.org/valgrind/trunk@6287 a5019735-40e9-0310-863c-91ae7b9d1cf9
1 file changed