haiku: pass SA_SIGINFO flag to the signal handler. This seems correct ucontext IP and BP register contents, for valid stacktraces on signals

git-svn-id: trunk@40844 -

rtl/haiku/system.pp

@@ -231,7 +231,7 @@ begin
   { initialize handler                    }
   act.sa_mask[0] := 0;
   act.sa_handler := SigActionHandler(@SignalToRunError);
-  act.sa_flags := SA_ONSTACK;
+  act.sa_flags := SA_ONSTACK or SA_SIGINFO;
   FpSigAction(signum,@act,@oldact);
 end;