sync further changes from uts/aslr

@@ -45,10 +45,11 @@
     exit 1;
 fi
 
 ## kernel-produced core
 kill -SEGV $pid
+wait $pid >/dev/null 2>&1
 
 cat > core-expected.$$ <<EOF
 core 'core' of $pid:    sleep 100000
         E:      aslr
         I:      aslr