Merge r6120:

Get rid of VG_(sigtimedwait) and replace it a simpler version,
VG_(sigtimedwait_zero), which polls for signals and returns
immediately.  AIX doesn't have a sigtimedwait syscall, so in that case
try and implement VG_(sigtimedwait_zero) using various other signal
syscalls.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@6259 a5019735-40e9-0310-863c-91ae7b9d1cf9
2 files changed