hush: fix '{ false; echo $?; }' bug.
hush: expand testsuite. variable expansion is still very broken

diff --git a/shell/hush_test/hush-vars/var.right b/shell/hush_test/hush-vars/var.right
index c13b98e..14b2314 100644
--- a/shell/hush_test/hush-vars/var.right
+++ b/shell/hush_test/hush-vars/var.right
@@ -1,4 +1,4 @@
 http://busybox.net
 http://busybox.net_abc
 1
-0
+1