ash: add all hush parsing tests to ast tests

All pass.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/shell/ash_test/ash-parsing/escape5.right b/shell/ash_test/ash-parsing/escape5.right
new file mode 100644
index 0000000..3cdd393
--- /dev/null
+++ b/shell/ash_test/ash-parsing/escape5.right
@@ -0,0 +1,9 @@
+a\nb\nc\n
+a
+b
+c
+a\nb\nc\n
+a
+b
+c
+Done