shells: fix var_LINENO1.tests false positive, add it to ash tests too

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/shell/ash_test/ash-vars/var_LINENO1.right b/shell/ash_test/ash-vars/var_LINENO1.right
new file mode 100644
index 0000000..31e1a44
--- /dev/null
+++ b/shell/ash_test/ash-vars/var_LINENO1.right
@@ -0,0 +1,8 @@
+2:2
+3:3
+4:4
+5:5
+2:2
+3:3
+4:4
+5:5