ash: add most of hush process subst tests

ash passes these.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/shell/ash_test/ash-psubst/tick.right b/shell/ash_test/ash-psubst/tick.right
new file mode 100644
index 0000000..6ed281c
--- /dev/null
+++ b/shell/ash_test/ash-psubst/tick.right
@@ -0,0 +1,2 @@
+1
+1